US20020068744A1

US20020068744A1 - Substituted-triazolopyrimidines as anticancer agents

Info

Publication number: US20020068744A1
Application number: US09/895,975
Authority: US
Inventors: Mark Schmitt; Donald Kirsch; Jane Harris; Carl Beyer; Klaus-Juergen Pees; Paul Carter; Waldemar Pfrengle; Guido Albert
Original assignee: American Home Products Corp
Current assignee: Wyeth LLC
Priority date: 2000-06-30
Filing date: 2001-06-29
Publication date: 2002-06-06
Also published as: EA006483B1; US7329663B2; EP1307200A2; IL152869A0; IN2003KO00001A; HUP0300798A2; MXPA02011913A; AU7306201A; KR20030013475A; WO2002002563A2; NO20026195D0; SK18412002A3; NO20026195L; CZ20024150A3; JP2004502691A; AU2001273062B2; CA2413802A1; CN1592624A; WO2002002563A3; HUP0300798A3

Abstract

The invention provides a method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof which comprises administering to said mammal an effective amount of a substituted triazolopyrimidine derivative or a pharmaceutically acceptable salt thereof and further provides a method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof by interacting with tubulin and microtubules and promoting microtubule polymerization which comprises administering to said mammal an effective amount of a substituted triazolopyrimidine derivative or a pharmaceutically acceptable salt thereof.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims benefit of U.S. Provisional Appl. No. 60/215,585, which was filed Jun. 30, 2000. This application is herein incorporated by reference.[0001]

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal by administering an effective amount of a substituted-triazolopyrimidine derivative and pharmaceutically acceptable salts thereof. Further, the present invention relates to a method for the treatment or prevention of (MDR) multiple drug resistance in a mammal in need thereof which method comprises adminstering to said mammal an effective amount of a substituted triazolopyrimidine derivative or a pharmaceutically acceptable salt thereof. More specifically, the present invention relates to a method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal by interacting with tubulin and microtubules and promotion of microtubule polymerization which comprises administering to said mammal an effective amount of a substituted-triazolopyrimidine derivative and pharmaceutically acceptable salts thereof.

2. Description of the Prior Art

Most of the cytostatics in use today either inhibit the formation of essential precursors for biosynthesis of DNA or block DNA polymerases or interfere with the template function of DNA because DNA was the primary target for developing therapeutic drugs for chemotherapy. Unfortunately, inhibition of the formation of essential precursors for biosynthesis of DNA or blocking DNA polymerases or interference with the template function of DNA also affects normal tissues.

Microtubules are among the cellular structures necessary for cell growth. Tubulin is the biochemical target for several anticancer drugs, which include the vinca alkaloids vincristine and vinblastine. The interaction of vincristine and vinblastine by binding to the alpha and beta-tubulin subunits interfere with the growing and shortening of the microtubules and prevents the formation of microtubules necessary for cell functions. While these compounds have efficacy in cancer chemotherapy, they also have a destabilizing effect on the microtubules which also affects rapidly proliferating normal tissues and leads to toxicity.

Paclitaxel and its semisynthetic derivative docetaxel (Taxotere®) also interfere with microtubule formation and stabilise microtubules. Paclitaxel (Taxol®),is a diterpene isolated from the bark of the Western (Pacific) yew, Taxus brevifolia and is representative of a new class of therapeutic agent having a taxane ring system. It was additionally found in other members of the Taxacae family including the yew of Canada (Taxus canadensis) found in Gaspesia, eastern Canada and Taxus baccata found in Europe whose needles contain paclitaxel and analogs and hence provide a renewable source of paclitaxel and derivatives. The crude extract was tested for the first time during the 1960s and its active principle was isolated in 1971 and the chemical structure identified (M. C. Wani et al, J. Am. Chem. Soc., 93, 2325 (1971)). Further, a wide range of activity over melanoma cells, leukemia, various carcinomas, sarcomas and non-Hodgkin lymphomas as well as a number of solid tumors in animals was shown through additional testing. Paclitaxel and its analogs have been produced by partial synthesis from 10-deacetylbaccatin III, a precursor obtained from yew needles and twigs, and by total synthesis (Holton, et al., J. Am. Chem. Soc. 116:1597-1601 (1994) and Nicolaou, et al., Nature 367:630-634 (1994)). Paclitaxel has been demonstrated to possess antineoplastic activity. More recently, it was shown that the antitumor activity of paclitaxel is due to a promotion of microtubule polymerization (Kumar, N., J. Biol. Chem. 256:10435-10441 (1981); Rowinsky, et al., J. Natl. Cancer Inst., 82:1247-1259 (1990); and Schiff, et al., Nature, 277:665-667 (1979)). Paclitaxel has now demonstrated efficacy in several human tumors in clinical trials (McGuire, et al., Ann. Int. Med., 111:273-279 (1989); Holmes, et al., J. Natl. Cancer Inst., 83:1797-1805 (1991); Kohn et al., J. Natl. Cancer Inst., 86:18-24 (1994); and A. Bicker et al., Anti-Cancer Drugs, 4,141-148 (1993)

Paclitaxel is a microtubule blocker, inhibiting mitosis by interaction with microtubules. Paclitaxel does not prevent tubulin assembly but rather accelerates tubulin polymerization and stabilizes the assembled microtubules. Paclitaxel acts in a unique way which consists in binding to microtubules, preventing their depolymerization under conditions where usually depolymerization occurred(dilution, calcium, cold and microtubules disrupting drugs). Paclitaxel blocks the cell cycle at prophase which results in an accumulation of cells in G2+M.

Accordingly, there is still a need in the art for cytotoxic agents for use in cancer therapy. In particular, there is a need for drugs which inhibit or treat the growth of tumors which have an effect similar to paclitaxel and interfere with the process of microtubule formation. Additionally, there is a need in the art for agents which accelerate tubulin polymerization and stabilize the assembled microtubules.

Accordingly, it would be advantageous to provide a method of treating or inhibiting cell proliferation, neoplastic growth and malignant tumor growth in mammals by administering compounds which have paclitaxel like anticancer activity.

Additionally, it would be advantageous to provide a method for treating or inhibiting multiple drug resistance (MDR).

Substituted triazolopyrimidine compounds of this invention are known to the art and have found use in agriculture as fungicides. The preparation of compounds of this invention and methods of preparation are disclosed in the following U.S. Pat. Nos.: 5,593,996; 5,756,509;5,948,783; 5,981,534; 5,612,345; 5,994,360; 6,020,338; 5,985,883; 5,854,252; 5,808,066; 5,817,663; 5,955,252; 5,965,561; 5,986,135; and 5,750,766.

Compounds of this invention are also prepared according to procedures described in the following International Publication Numbers: WO98/46607; WO98/46608; WO99/48893; WO99/41255; EPO 834513A2; EPO 782997A2; EPO 550113B1; EPO 613900B1; FR2784381A1; EPO 989130A1; WO98/41496; WO94/20501; EPO 945453A1; EPO 562615Al and EPO 562615B1.

SUMMARY OF THE INVENTION

A first object of the present invention is to provide a method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal by administering an effective amount of a substituted-triazolopyrimidine derivative and pharmaceutically acceptable salts thereof.

A second object of the present invention is to provide a method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof by interacting with tubulin and microtubules by promotion of microtubule polymerization which comprises administering to said mammal an effective amount of a substituted-triazolopyrimidine derivative and pharmaceutically acceptable salts thereof.

A third object of the present invention is to provide a method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof by administering to said mammal an effective amount of a compound of Formula (I):

wherein:

R ¹is selected from the group consisting of halogen, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, optionally substituted aryl of 6, 1 0 or 14 carbon atoms, —CN, hydroxy, halogen, carbamoyl, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, heterocyclyl, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, thiophene, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-cycloalkyl of 3 to 8 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^b;

R ^ais H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms,optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted tricycloalkyl, haloalkyl of 1 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl, cycloalkyl of 3 to 8 carbon atoms or a 3- to 6-membered heterocyclyl ring, optionally ortho-fused with an optionally substituted phenyl ring;

R ^bis H, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl, —S-alkenyl, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl, —SO₂alkyl, —O-aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl, cycloalkyl of 3 to 8 carbon atoms or a 3- to 6-membered heterocyclyl ring, optionally ortho-fused with an optionally substituted phenyl ring;

R ^aR^btogether with the nitrogen atom to which each is attached represent an optionally substituted saturated or unsaturated heterocyclyl ring from 3 to 12 ring atoms in which optionally, at least one —CH₂— may optionally be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, said saturated or unsaturated heterocyclyl ring may optionally be aryl or cycloalkyl fused;

R ²is H, optionally substituted alkyl of 1 to 12 carbon atoms, amino, hydroxy, alkylthio of 1 to 12 carbon atoms, cyano, carbamoyl, optionally substituted alkoxy of 1 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, aryloxy, benzyloxy, thienyl, heterocyclyl or halogen;

R ³is H, halogen, alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, aryloxy, —NR^cR^d, benzyloxy, aralkyloxy, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, heterocyclyl, aryl, hydroxy, carbamoyl, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃;

R ^cis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, or heterocyclyl;

R ^dis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, or heterocyclyl;

R ^cR^dtogether with the nitrogen atom to which each is attached represent an optionally substituted heterocyclyl ring from 3 to 8 ring atoms optionally substituted in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or alkyl of 1 to 12 carbon atoms;

R ⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, halogen, cyano, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, heterocyclyl, halogen, carbamoyl, optionally substituted aryl of 6, 10 or 14 carbon atoms, or —CH₃;

provided that when: a) R ¹is diethylamino, R³is chloro, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl, 3,4-dichlorophenyl, 4-chlorophenyl, 3-chloro-4-methoxyphenyl; b) R¹is diethylamino, R³is bromo, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl; c) R¹is isopropylamino, R³is chloro, R⁴is hydrogen, R²is not 2-benzyloxyphenyl or 3,4,5-trimethoxyphenyl; d) R¹is cyclopentylamino, R³is chloro, R4 is hydrogen, R²is not 3,4,5-trimethoxyphenyl, 2-napthyl or 2-stilbene; e) R¹is 2-amino-bicyclo(2.2.1.)heptyl, R³is chloro, R⁴is hydrogen, R²is not 3,4,5-trimethoxyphenyl and f) R¹is diethylamino, R³is chloro, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl and g) R¹is 1,1,1-trifluoroethoxy, R³is chloro, R⁴is hydrogen, R²is not 2-chloro-6-fluorophenyl h) R¹is —SO₂ethyl or —SO₂cyclopentyl, R³is chloro, R⁴is hydrogen, R²is not 2-chloro-6-fluorophenyl; i) R⁴is hydrogen, R²is 2-chloro-6-fluorophenyl, R¹and R³are not 1,2,4-triazole; j) R¹is cyclohexyl, R⁴is hydrogen, R²is 2,4,6-trifluorophenyl, and R³is not —OCH₂O₂C(CH₃)₃; k) R¹is 2-thienyl, R⁴is ethyl, R³is hydrogen and R²is not 2-methoxyphenyl, 4-methoxyphenyl, and 4-trifluorophenyl; i) R²is phenyl, R³is chloro, R⁴is hydrogen, R¹is not (2E)-, 7-dimethyl-2,6-octadienyl

or a pharmaceutically acceptable salt thereof.

A fourth object of the present invention is to provide a method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof by interacting with tubulin and microtubules by promotion of microtubule polymerization which comprises administering to said mammal an effective amount of a compound of Formula (I):

wherein:

R ¹is selected from the group consisting of halogen, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, —CN, hydroxy, halogen, carbamoyl, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, heterocyclyl, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, thiophene, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-cycloalkyl of 3 to 8 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^b;

R ^bis H, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or—NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl, —S-alkenyl, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl, —SO₂alkyl, —O-aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl, cycloalkyl of 3 to 8 carbon atoms or a 3- to 6-membered heterocyclyl ring, optionally ortho-fused with an optionally substituted phenyl ring;

R ^cis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, heterocyclyl;

R ^cR^dtogether with the nitrogen atom to which each is attached represent an optionally substituted heterocyclyl ring from 3 to 8 ring atoms optionally substituted in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or alkyl of 1 to 12 carbon atoms; R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, halogen, cyano, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, heterocyclyl, halogen, carbamoyl, optionally substituted aryl of 6, 10 or 14 carbon atoms, or —CF₃;

provided that when: a) R ¹is diethylamino, R³is chloro, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl, 3,4-dichlorophenyl, 4-chlorophenyl, 3-chloro-4-methoxyphenyl; b) R¹is diethylamino, R³is bromo, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl; c) R¹is isopropylamino, R³is chloro, R⁴is hydrogen, R²is not 2-benzyloxyphenyl or 3,4,5-trimethoxyphenyl; d) R¹is cyclopentylamino, R³is chloro, R⁴is hydrogen, R²is not 3,4,5-trimethoxyphenyl, 2-napthyl or 2-stilbene; e) R¹is 2-amino-bicyclo(2.2.1.)heptyl, R³is chloro, R⁴is hydrogen, R²is not 3,4,5-trimethoxyphenyl and f) R¹is diethylamino, R³is chloro, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl and g) R¹is 1,1,1-trifluoroethoxy, R³is chloro, R⁴is hydrogen, R²is not 2-chloro-6-fluorophenyl h) R¹is —SO₂ethyl or —SO₂cyclopentyl, R³is chloro, R⁴is hydrogen, R²is not 2-chloro-6-fluorophenyl; i) R⁴is hydrogen, R²is 2-chloro-6-fluorophenyl, R¹and R³are not 1,2,4-triazole; j) R¹is cyclohexyl, R⁴is hydrogen, R²is 2,4,6trifluorophenyl, and R³is not —OCH₂O₂C(CH₃)₃; k) R¹is 2-thienyl, R⁴-is ethyl, R³is hydrogen and R²is not 2-methoxyphenyl, 4-methoxyphenyl, and 4-trifluorophenyl; I) R²is phenyl, R³is chloro, R⁴is hydrogen R¹is not (2E)-, 7-dimethyl-2,6-octadienyl

or a pharmaceutically acceptable salt thereof.

A fifth object of the present invention is to provide a method for the treatment or prevention of multiple drug resistance (MDR) in a mammal in need thereof which method comprises administering to said mammal an effective amount of a substituted triazolopyrimidine derivative or a pharmaceutically acceptable salt thereof. In particular the multiple drug resistance (MDR) is mediated by p-glycoprotein or MXR.

A sixth object of the present invention is to provide a method for the treatment or prevention of multiple drug reistance (MDR) in a mammal in need thereof by administering to said mammal an effective amount of a compound of Formula (I):

wherein:

R ¹is selected from the group consisting of halogen, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, —CN, hydroxy, halogen, carbamoyl, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, heterocyclyl, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, thiophene, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-cycloalkyl of 3 to 8 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^b; R^ais H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms,optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted tricycloalkyl, haloalkyl of 1 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl, cycloalkyl of 3 to 8 carbon atoms or a 3- to 6-membered heterocyclyl ring, optionally ortho-fused with an optionally substituted phenyl ring;

R ⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, halogen, cyano, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, heterocyclyl, halogen, carbamoyl, optionally substituted aryl of 6, 10 or 14 carbon atoms, or —CF₃;

provided that when: a) R ¹is diethylamino, R³is chloro, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl, 3,4-dichlorophenyl, 4-chlorophenyl, 3-chloro-4-methoxyphenyl; b) R¹is diethylamino, R³is bromo, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl; c) R¹is isopropylamino, R³is chloro, R⁴is hydrogen, R²is not 2-benzyloxyphenyl or 3,4,5-trimethoxyphenyl; d) R¹is cyclopentylamino, R³is chloro, R⁴is hydrogen, R²is not 3,4,5-trimethoxyphenyl, 2-napthyl or 2-stilbene; e) R¹is 2-amino-bicyclo(2.2.1.)heptyl, R³is chloro, R⁴is hydrogen, R²is not 3,4,5-trimethoxyphenyl and f) R¹is diethylamino, R³is chloro, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl and g) R¹is 1,1,1-trifluoroethoxy, R³is chloro, R⁴is hydrogen, R²is not 2-chloro-6-fluorophenyl h) R¹is —SO₂ethyl or —SO₂cyclopentyl, R³is chloro, R⁴is hydrogen, R²is not 2-chloro-6-fluorophenyl; i) R⁴is hydrogen, R²is 2-chloro-6-fluorophenyl, R¹and R³are not 1,2,4-triazole; j) R¹is cyclohexyl, R⁴is hydrogen, R²is 2,4,6-trifluorophenyl, and R³is not —OCH₂O₂C(CH₃)₃; k) R¹is 2-thienyl, R⁴is ethyl, R³is hydrogen and R²is not 2-methoxyphenyl, 4-methoxyphenyl, and 4-trifluorophenyl; I) R²is phenyl, R³is chloro, R⁴is hydrogen, R¹is not (2 E)-, 7-dimethyl-2,6-octadienyl

or a pharmaceutically acceptable salt thereof.

Among the preferred groups of compounds of Formula (I) including pharmaceutically acceptable salts thereof useful for the methods of this invention are those in the subgroups below wherein the other variables of Formula (I) in the subgroups are as defined above wherein:

a) R ¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^b;

b) R ^aand R^beach independently represent the moiety —C*H(R^e)(R^f) where R^eand R^findependently represent an optionally halo-substituted alkyl group of 1 to 12 carbon atoms where C* represents the (R) or (S) isomer;

c) R ²is optionally substituted aryl of 6, 10 or 14 carbon atoms, aryloxy, thienyl, benzyloxy, heterocyclyl or halogen;

d) R ³is halogen, alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, aryloxy, —NR^cR^d, benzyloxy, aralkyloxy, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, hydroxy, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃;

e) R ⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃;

Among the additionally preferred groups of compounds of this invention according to general Formula (I) including pharmaceutically acceptable salts thereof useful for the methods of this invention are those in the subgroups below, wherein the other variables of Formula (I) in the subgroups are as defined above wherein:

a) R ¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or—NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

b) R ²is optionally substituted aryl of 6, 10 or 14 carbon atoms or heterocyclyl;

c) R ³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃;

d) R ⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃;

Among the more preferred groups of compounds of Formula (I) including pharmaceutically acceptable salts thereof useful for the methods of this invention are those in the subgroups below including the pharmaceutically acceptable salts thereof wherein the other variables of Formula (I) in the subgroups are as defined above wherein:

a) R ¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 5 to 10 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

b) R ²is optionally substituted aryl of 6, 10 or 14 carbon atoms;

c) R ³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or—N₃;

d) R ⁴is H;

Among the most preferred groups of compounds of Formula (I) including pharmaceutically acceptable salts thereof useful for the methods of this invention are those in the subgroups below including the pharmaceutically acceptable salts thereof wherein the other variables of Formula (I) in the subgroups are as defined above wherein:

a) R ¹is selected from the group consisting of an optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached; R²is optionally substituted phenyl; R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃; R⁴is H;

b) R ¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached; R²is optionally substituted phenyl; R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃; R⁴is H;

c) R ¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R ²is optionally substituted phenyl;

R ³is halogen, alkoxy, —NR¹R^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃;

R ⁴is H;

R ^ais H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl; R^bis H, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms; R^aR^btogether with the nitrogen atom to which each is attached represent an optionally substituted saturated or unsaturated heterocyclyl ring from 3 to 12 ring atoms in which optionally, at least one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 2 to 12 carbon atoms, said saturated or unsaturated heterocyclyl ring may optionally be aryl or cycloalkyl fused;

R ^cis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, or heterocyclyl;

R ^dis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, or heterocyclyl;

R ^cR^dtogether with the nitrogen atom to which each is attached represent an optionally substituted heterocyclyl ring from 3 to 8 ring atoms optionally substituted in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or alkyl of 2 to 20 carbon atoms;

d) R ¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R ²is selected from

R ³is halogen, alkoxy, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃;

R ⁴is H;

e) R ¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R ²is optionally substituted phenyl;

R ³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃;

R ⁴is H;

f) R ¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R ²is optionally substituted thienyl;

R ³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12

carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or—N ₃; R⁴is H;

Also, among the most particularly preferred compounds for the methods of this invention according to Formula (I) are the following compounds or a pharmaceutically acceptable salt thereof:

7-(1-azepanyl)-5-chloro-6-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(4-methoxyphenyl)-7-(1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(2-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

methyl [[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl](methyl)amino]acetate;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(1,1,3,3-tetramethylbutyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-(1-azepanyl)-5-chloro-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-6-(4-bromophenyl)-5-chloro[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(1-piperidinyl)-6-[2-(trifluoromethyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine;

6-(4-tert-butylphenyl)-5-chloro-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(4-methoxyphenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(4-methoxyphenyl)-7-(3-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

6-(4-bromophenyl)-5-chloro-7-(3-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(3,4-difluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-dichlorophenyl)-7-(2-methyl-1-pyrrolidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chlorophenyl)-7-(2-methyl-1-pyrrolidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(3-chloro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(3-chloro-4-methoxyphenyl)-7-(4-methyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(3-chloro-4-methoxyphenyl)-7-(2-methyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

6-(4-tert-butylphenyl)-5-chloro-7-(2-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(2-methyl-1-piperidinyl)-6-[3-(trifluoromethyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine;

Diethyl 2-[6-(2,6-difluorophenyl)-5-ethoxy[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]malonate;

7-(azepanyl)-5-chloro-6-{2-chloro-6-nitrophenyl}[1,2,4}triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-[(2,2-dichlorocyclopropyl)methyl]-N-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

1-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-3-piperidinol;

N-bicyclo[2.2.1 ]hept-2-yl-5-chloro-6-(3-chloro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,5-difluorophenyl)-N-dodecyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-7-(4-methyl-1-piperidinyl)-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

N-[5-chloro-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-N-isopropylamine;

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

N-allyl-5-chloro-6-(2-chloro-6-fluorophenyl)-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(3-chloro-4-methoxyphenyl)-N-cycloheptyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(3-chloro-4-methoxyphenyl)-7-(3,3-dimethyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-(3-chloropropyl)-N-methyl-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-(1-azocanyl)-5-chloro-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluorophenyl)-7-(3,6-dihydro-1(2H)-pyridinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azocanyl)-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-methoxy-6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-1o yl]methanol;

1-[5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-4-piperidinol;

5-chloro-7-(4-chloro-1-piperidinyl)-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(4-thiomorpholinyl)-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluorophenyl)-7-(2,4-dimethyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(4-methyl-1-piperidinyl)-5-amino-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluorophenyl)-7-(2,5-dihydro-1H-pyrrol-1-yl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(2,5-dimethyl-2,5-dihydro-1H-pyrrol-1-yl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(2-ethyl-1H-imidazol-1-yl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(4-bromo-1-piperidinyl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-methylphenyl)-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

6-(2-bromophenyl)-N-(sec-butyl)-5-chloro[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-ethyl-6-(4-methoxyphenyl)-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(4-methoxyphenyl)-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(4-chloro-1-piperidinyl)-6-[2-(trifluoromethyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(trifluoromethyl)-1-piperidinyl][1,2,4]triazolo[1,5-a]pyrimidine;

7-(4-bromo-1-piperidinyl)-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(4-bromo-1-piperidinyl )-5-chloro-6-(2-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-isopropyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-7-(4-thiomorpholinyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[2-(1-pyrrolidinyl)-1-cyclopenten-1-yl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(4-isopropyl-1-piperidinyl)-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(2,4-dimethyl-1-piperidinyl)-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-[ethyl (2-methyl -2-propenyl )amino]-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

N-bicyclo[2.2. 1]hept-2-yl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluorophenyl)-N-(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5chloro-6-(2-chlorophenyl)-N-(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorobenzyl)-7-tetrahydro-2-furany[1,2,4]triazolo[1,5-a]pyrimidine;

7-(allylsulfanyl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-ethyl-6-mesityl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-ethyl-6-(2-methoxyphenyl)-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-hexyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-7-(4-methyl-1-piperidinyl)-6-[4-(methylsulfanyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-[4-(methylsulfanyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

N-(sec-butyl)-5-chloro-6-[4-(methylsulfanyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[4-(methylsulfanyl)phenyl]-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-[2,6-dichloro-4-(trifluoromethyl)phenyl]-7-(4-methyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-[2,6-dichloro-4-(trifluoromethyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[(2,2,2-trifluoroethyl)sulfanyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(4,4-dimethyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-[2,6-dichloro-4-(trifluoromethyl)phenyl]-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-dichloro-4-(trifluoromethyl)phenyl]-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(3,5-difluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(isopropylsulfanyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-tetrahydro-2-furanyl[1,2,4]triazolo[1,5-a]pyrimidine;

4-[5-chloro-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]aniline;

N-{4-[5-chloro-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]phenyl}acetamide;

[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]methyl acetate;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(chloromethyl)[1,2,4]triazolo[1,5-a]pyrimidine;

diethyl 2-[6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidin-5-yl]malonate;

7-(1-azepanylmethyl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

N-allyl-5-chloro-6-(2-chloro-6-fluorophenyl)-N-hexyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-7-(4-methyl-1-piperidinyl)-6-[4-(trifluoromethoxy)phenyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(4-methyl-1-piperidinyl)-6-(4-phenoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(cyclopropylmethyl)-N-propyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-7-(2-methyl-1-piperidinyl)-6-(4-phenoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-{2-chloro-4-nitrophenyl}-7-(4-methyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(4-chloro-2,3,5,6-tetrafluorophenyl)-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

4-[5-chloro-2-methyl-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]-N,N-dimethylaniline;

6-(2-chloro-6-fluorophenyl)-5-methyl-7-(4-methyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[2-(1-pyrrolidinyl)-1-cyclohexen-1-yl][1,2,4]triazolo[1,5-a]pyrimidine; 5-chloro-6-(2-chloro-6-fluorophenyl)-7-(methoxymethyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-{2-chloro-4-nitrophenyl}-7-[ethyl(2-methyl-2-propenyl)amino][1,2,4]triazolo[1,5-a]pyrimidine;

5-bromo-6-(2-chloro-6-fluorophenyl)-7-(isopropylsulfanyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-cyclopentyl-6-(4-ethoxy-2,3,5,6-tetrafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-methyl-N-(2-methyl-2-propenyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

4-bromo-1-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]-pyrimidin-7-yl]butyl acetate;

diethyl 2-allyl-2-{[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]oxy}malonate;

6-(2-chloro-6-fluorophenyl)-N-ethyl-5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

N-butyl-5-chloro-N-ethyl-6-(2,3,4,5,6-pentafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-(2-chloro-6-fluorophenyl)-5-(difluoromethoxy)-7-(4-methyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[(4-chlorophenyl)sulfanyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[(2-methoxyphenyl)sulfanyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,3,4,5,6-pentafluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,4,6-trifluorophenyl)-N-( I, 2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(4-fluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5,7-bis(4-methyl-1-piperidinyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-methylphenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,4,5-trifluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-(2-bromophenyl)-5-chloro-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-isobutyl-N-(2,2,2-trifluoroethyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-isobutyl-6-(2-methylphenyl)-N-(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(2,2,2-trifluoro-1 -methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluorophenyl)-N-(2,2,2-trifluoro-1 -methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-(2,2,2-trifluoro-1-methylethyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

N-allyl-5-chloro-N-isobutyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-(1,2-dimethylpropyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-isopropyl-N-methyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-5 a]pyrimidin-7-amine;

5-chloro-N-isopropyl-N-(2,2,2-trifluoroethyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-butyl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-(1-phenylethyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chlorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-ethyl-N-isobutyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-hexyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-methylphenyl)-N,N-bis(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-cyclopentyl-N-methyl-6-(2,3,4,5,6-pentafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-butyl-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-(1,2-dimethylpropyl)-N-methyl-6-(2,3,4,5,6-pentafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(2-methylpropanyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-pentyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-(1,2-dimethylpropyl)-N-methyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-bromo-5-chlorophenyl)-N-(2,2,2-trifluoro-1 -methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(3,3,3-trifluoropropyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(3-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

[5-chloro-6-(2,4,6-trifluorophenyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-(1-p-tolyl-ethyl)-amine;

5-chloro-6-(2,4,6-trifluoro-phenyl )-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-cyclohexyl-6-(2,3,4,5,6-pentafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(4,4-difluoro-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(bicyclo[2.2.1 ]hept-2-ylamino)-5-chloro-6-{2-fluoro-4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-{2-fluoro-4-nitrophenyl}-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1-a]pyrimidine;

5-(methylsulfanyl)-6-(2-chloro-6-fluorophenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine;

[5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl] (2,2,2-trifluoro-1-phenylethyl)-amine;

5-chloro-N-[1-(trifluoromethyl)propyl]-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-bromo-6-(2-chloro-6-fluorophenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine;

6-(2-chloro-6-fluorophenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidin-5-amine;

[5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-(2-methyl-1-trifluoromethyl-propyl)amine;

5-chloro-7-(3-cyclohexen-1-yl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(1-cyclohexen-1-yl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-[(1R)-2,2,2-trifluoro-1-methylethyl]-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-(2,4-difluorophenyl)-5-chloro-N-(2,2,2-trifluoro-1 -methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-(2,2,2-trifluoro-1 -methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-7-cyclohexyl-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-[(1S)-2,2,2-trifluoro-1 -methylethyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-cyclohexyl-6-(2,6-difluoro-4-methoxyphenyl)-5-methoxy[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(4-fluorocyclohexyl )-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-dichloro-4-fluorophenyl)-7-(3,3,3-trifluoropropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

N-(sec-butyl)-5-chloro-6-(2,6-dichloro-4-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

4-{5-chloro-7-[(2,2,2-trifluoro-1-methylethyl)amino][1,2,4]triazolo[1,5-a]pyrimidin-6-yl}-3,6-difluorophenol;

5-chloro-7-(3-cyclohexen-1-yl)-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-cyclopentyl-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(3,6-dihydro-1(2H)-pyridinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(4-fluorocyclohexyl)[1,2,4]triazolo[1,5-a]pyrimidine;

6-(4-{5-chloro-7-[(2,2,2-trifluoro-1-methylethyl)amino][1,2,4]triazolo[1,5-a]pyrimidin-6-yl}-3,5-difluorophenoxy)hexanoic acid;

2,6-difluoro-4-(2-fluoroethoxy)phenyl]-N-(2,2,2-trifluoro-1 -methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-isopropyl-6-{2-[(trifluoromethyl)sulfanyl]phenyl}[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-[4-(trifluoromethyl)phenyl]-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-(4,4,4-trifluoro-2-methylbutyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(3-methyl-3-butenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-isobutyl[1,2,4]triazolo[1,5-a]pyrimidine;

7-cyclopentyl-6-(2,6-difluoro-4-methoxyphenyl)-5-methoxy[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-thienyl)-N-[(1R)-2,2,2-trifluoro-1-methylethyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

4-(5-chloro-7-(2,2,2-trifluoro-1-methyl-ethylamino)[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]-3,5-difluoro-phenol;

{5-chloro-6-[2,6-difluoro-4-(2,2,2-trifluoro-ethoxy)-phenyl]-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl}-(2,2,2-trifluoro-1-methyl-ethyl)amine;

5-chloro-6-{2,6-difluoro-4-(methoxyphenyl)-N-(2,2,2-trifluoro-1 -methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

(5-chloro-6-{4-[2-(2-ethoxyethoxy]-ethoxy]-2,6-difluoro-phenyl}[1,2,4]triazolo[1,5-a]pyrimidin-7-yl-)-(2,2,2-trifluoro-1 -methylethyl)amine;

(5-chloro-6-{2,6-difluoro-4-[2-(2-methoxy-ethoxy)ethoxy]-phenyl}-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl-)-(2,2,2-trifluoro-1-methylethyl)amine;

5-chloro-6-[2,6-difluoro-4-(3-furan-3-ylmethoxy)phenyl[1,2,4]triazolo[1,5-a]pyrimidin-7-yl}-N-(2,2,2-trifluoro-1-methylethyl)amine;

5-chloro-6-(2,5-difluoro-4-methoxyphenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-cyclohexyl-6-[2,6-difluoro-4-(2-methoxyethoxy)phenyl]-5-methoxy[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-fluoro-4-methoxy-6-chlorophenyl)-N-(2,2,2-trifluoro-1 -methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-difluoro-4-(2-fluoroethoxy)phenyl]-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine; 2-[2-(4-{5-chloro-7-[(2,2,2-trifluoro-1-methylethyl)amino][1,2,4]triazolo[1,5-a]pyrimidin-6-yl}-3,5-difluorophenoxy)ethoxy]ethanol;

5-chloro-6-(2,3-difluoro-4-methoxyphenyl)-N-(2,2,2-trifluoro-1 -methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-{4-(2-fluoroethoxy)-2,6-difluorphenyl}-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-(4-chlorobenzyl)-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(2-pyridinyl)-1 -piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(1-ethylpentyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(2-chlorophenyl)-1 -piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(4-methoxyphenyl)-3-methyl-1 -piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-cyclopentyl-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-7-phenoxy-6-(4-methoxy-phenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-cyclopentyl-6-(4-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5,7-diphenoxy-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-cyclopentyl-6-(2-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N,N-diethyl-6-[4-methoxyphenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N,N-diethyl-6-[2,4-dichlorophenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

N-bicyclo[2.2.1]hept-2-yl-5-chloro-6-(2,4-dichlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-cyano-7-(4-methyl-1-piperidinyl)-6-(2-chloro-5-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-(methylsulfanyl)-7-(4-methyl-1-piperidinyl)-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-(methylsulfanyl)-7-(4-methyl-1-piperidinyl)-6-(2-chloro-5-(methylsulfanyl)phenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(1,4-dioxa-8-azaspiro[4,5]dec-8-yl)-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-(4-(methylsulfanyl)phenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

2-methyl-6,7-di-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-methyl-6-phenyl-7-(4-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-trifluoromethyl-6-phenyl-7-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5,7-diphenoxy-6-(2-methylpropyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(3,4-difluorophenyl)-N-(isopropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-bromo-6-(4-bromophenyl)-7-dimethylamino[1,2,4]triazolo[1,5-a]pyrimidine;

5-bromo-6-(4-trifluoromethylphenyl)-7-dimethylamino[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(3,4-difluorophenyl)-7-dimethylamino[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(4-trifluoromethylphenyl)-N-(ethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-(1-azepanyl)-5-chloro-6-(4-tert-butylphenyl )[1,2,4]triazolo[1,5-a]pyrimidine;

ethyl {[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]amino}acetate;

diethyl 5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-malonate;

5-chloro-6-(2,5-difluorophenyl)-N-(3-methyl-2-butenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

[5-chloro-6-(2-chloro-6-fluorophenyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]acetic -acid methyl ester;

5-chloro-6-(2,6-difluorophenyl)-7-(2-ethyl-1H-imidazol-1-yl)[1,2,4]triazolo[ -1,5a]pyrimidine;

5-chloro-N,N-diethyl-6-[4-(methylsulfanyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

ethyl [6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1-piperidinyl)-[1,2,4]triazolo[1,5-a]pyrimidin-5-yl]acetate;

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-(4-phenoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

dimethyl 2-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7yl]malonate;

diethyl 2-{[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]oxy}-2-isobutylmalonate;

2-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-1,3-cyclohexanedione;

2-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]cyclohexanone;

5-chloro-7-(3-nitro-4-methylanilino)-6-(2, 4, 6-trifluorophenyl) -[1,2,4]triazolo[1,5-a]pyrimidine;

7-cyclohexyl-6-[2,6-difluoro-4-(2-methoxyethoxy)phenyl]5-(2-methoxyethoxy)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(3-bromophenyl)-2-ethyl-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(3-bromophenyl)-6-(3-chlorophenyl)-2-ethyl[1,2,4]triazolo[1,5-a]pyrimidine;

7-(4-bromophenyl)-2-ethyl-6-[4-(trifluoromethyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(3,4,5-trimethoxybenzyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-(2-benzyl-4,5-dihydro-1H-imidazol-1-yl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

N-4-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl-N,N-1-diethyl-1,4-pentanediamine;

5-chloro-N-(3-methyl-2-butenyl)-6-phenyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-dimethylamino-6-phenyl-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-7-[(2-furylmethyl)sulfanyl]-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

6-[1,1′-biphenyl]-4-yl-5-chloro-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-[4-(benzyloxy)phenyl]-5-chloro-N-isopropyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-[(2,2-dichlorocyclopropyl)methyl]-6-(3,4,5-trimethoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

N-cyclopentyl-6-(2-fluorophenyl )-5-hydrazino[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-ethyl-6-(2-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-(4-tert-butyl phenyl)-5-chloro-N-isopropyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-difluoro-4-[(3-methyl-2-butenyl)oxy]phenyl]-N-(2,2,2-trifluoro-1-methylethyl)-l[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-difluoro-4-(1-propenyloxy)phenyl]-N-(2,2,2-trifluoro-1 -methylethyl)-l[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-(3-tricyclo[2.2.1.0 ^2,6]hept-1-yl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-azido-7-cyclohexyl-6-(2-fluoro-6-chlorophenyl) [1,2,4]triazolo[1,5-a]pyrimidine;

5-azido-6-[2-chloro-6-fluorophenyl]-7-(4-methyl-1 -piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2,5-dichloro-7-(4-methyl-1-piperidinyl)-6-[2-chloro-6-fluorophenyl][1,2,4]triazolo[1,5-a]pyrimidine.

It is understood that the definition of compounds of Formula (I), when R ¹, R², R³, R⁴, R^a, R^b, R^c, R^d, or R′ contain asymmetric carbons, encompass all possible stereoisomers and mixtures thereof which possess the activity discussed below. In particular, the definition encompasses racemic modifications and any optical isomers, (R) and (S), which possess the indicated activity. Optical isomers may be obtained in pure form by standard separation techniques or enantiomer specific synthesis. It is understood that this invention encompasses all crystalline forms of compounds of Formula (I). The pharmaceutically acceptable salts of the basic compounds of this invention are those derived from such organic and inorganic acids as: lactic, citric, acetic, tartaric, fumaric, succinic, maleic, malonic, hydrochloric, hydrobromic, phosphoric, nitric, sulfuric, methanesulfonic, and similarly known acceptable acids. Where R¹, R²R³, R⁴, R^a, R^b, R^c, R^dor R′ contains a carboxyl group, salts of the compounds in this invention may be formed with bases such as alkali metals (Na, K, Li) or alkaline earth metals (Ca or Mg).

For the compounds defined above and referred to herein, unless otherwise noted, the following terms are defined.

The term halogen atom may denote a bromine, iodine, chlorine or fluorine atom, and is especially a bromine, chlorine or fluorine atom.

The terms alkyl, alkenyl, alkynyl, alkadienyl as used herein with respect to a radical or moiety refer to a straight or branched chain radical or moiety. As a rule, such radicals have up to 12, in particular up to 6 carbon atoms. Suitably an alkyl moiety has from 1 to 6 carbon atoms, preferably from 1 to 3 carbon atoms. A preferred alkyl moiety is an ethyl or especially a methyl group. Suitably an alkenyl moiety has from 2 to 12 carbon atoms. A preferred alkenyl moiety has from 2 to 6 carbon atoms. Most preferred is allyl or especially a 2-methylallyl group. Any of the alkyl, alkenyl, alkynyl, alkadienyl groups as used herein with respect to the radical or moiety may optionally be substituted with one or more of substituents which include for example, halogen atoms, nitro, cyano, thiocyanato, cyanato, hydroxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, amino, alkylamino, dialkylamino, formyl, aryl, alkoxycarbonyl, carboxyl, alkanoyl, alkylthio, alkylsulphinyl, alkylsulphonyl, carbamoyl, alkylamido, phenyl, phenoxy, benzyl, benzyloxy, heterocyclyl, especially furyl, and cycloalkyl, especially cyclopropyl, groups. Typically, 0-3 substituents may be present.

Cycloalkyl or cycloalkenyl as used herein with respect to a radical or moiety refer to a cycloalkyl or cycloalkenyl group having 3 to 8 carbon atoms preferably 3 to 6 carbon atoms or a cycloalkenyl group having 5 to 8 carbon atoms, preferably 5 to 7 carbon atoms, in particular cyclopentyl, cyclohexyl or cyclohexenyl being optionally substituted by one or more of substituents which include for example, halogen atoms, nitro, cyano, thiocyanato, cyanato, hydroxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, amino, alkylamino, dialkylamino, formyl, alkoxycarbonyl, carboxyl, alkanoyl, alkylthio, alkylsulphinyl, alkylsulphonyl, carbamoyl, alkylamido, phenyl, phenoxy, benzyl, benzyloxy, heterocyclyl, especially furyl, and cycloalkyl, especially cyclopropyl, groups. Typically, 0-3 substituents may be present. Optionally, —CH ₂— group of the cycloalkyl or cycloalkenyl radical or moiety may optionally be replaced with —O—, —S— or —NR′ where R′ is H or an alkyl group of 2 to 12 carbon atoms.

A bicycloalkyl group may contain from 5 to 10 carbon atoms.

Aryl as used herein with respect to the radical or moiety refers to an aryl group having 6, 10 or 14 carbon atoms, preferably 6 to 10 carbon atoms, in particular, phenyl, or naphthyl group being optionally substituted by one or more independently selected substituents which include, halogen atoms, nitro, cyano, alkenyl, thiocyanato, cyanato, hydroxyl, alkyl, haloalkyl, alkoxy, alkenyloxy, haloalkoxy, amino, alkylamino, dialkylamino, formyl, alkoxycarbonyl, carboxyl, alkanoyl, alkylthio, alkylsulphinyl, alkylsulphonyl, carbamoyl, alkylamido, phenyl, phenoxy, benzyl, benzyloxy, heterocyclyl, and cycloalkyl, groups. Typically, 0-5 substituents may be present.

Aralkyl as used herein means an aryl-alkyl group in which the aryl and alkyl group are previously defined. Exemplary aralkyl groups include benzyl and phenethyl.

Aralkyloxy as used herein refers to an aryl-alkyl-O— group in which the alkyl group and aryl group are previously described.

Phenyl as used herein refers to a 6-membered aromatic ring.

Heterocyclyl group may be a single ring, a bicyclic ring system or a system of annelated or spiro-fused rings as a saturated or unsaturated moiety or radical having 3 to 12 ring atoms with 5 to 8 ring atoms preferred with 5 or 6 ring atoms more preferred selected from carbon, oxygen, sulfur and nitrogen, one or more, typically one or two, of which being oxygen, nitrogen or sulfur, being optionally substituted by one or more of substituents which include for example, halogen atoms, preferably fluorine, nitro, cyano, thiocyanato, cyanato, hydroxyl, alkyl of 1 to 12 carbon atoms, preferably 1 to 6 carbon atoms, haloalkyl, preferably haloalkyl of 1 to 6 carbon atoms, alkoxy, alkoxy of 1 to 12 carbon atoms, preferably alkoxy of 1 to 6 carbon atoms, haloalkoxy, amino, alkylamino, dialkylamino, formyl, alkoxycarbonyl, carboxyl, alkanoyl, alkylthio, alkylsulphinyl, alkylsulphonyl, carbamoyl, alkylamido, phenyl, phenoxy, benzyl, benzyloxy, heterocyclyl, especially furyl, and cycloalkyl, especially cyclopropyl, groups. Typically, 0-3 substituents may be present. Optionally substituted heterocyclyl groups include pyrrolodinyl, pyrrazolidinyl, piperidinyl, piperazinyl or morpholin-4-yl, pyridinyl, 2,3-dehydropiperid-3-yl, tetrahydropyranyl, tetrahydrofuranyl or tetrahydrothienyl, N-methyl-2,3-dehydropiperid-3-yl. pyrimidinyl, pyrrolidinyl, furyl, pyranyl, morpholinyl, tetrahydropyridine, thienyl, pyrrolidinyl, piperidyl, dihydropiperidyl, dihydropyridinyl, thiazanyl, morpholinyl, thiazinyl, azepanyl, azocanyl and dioxa-aza-spiro-decyl.

When any of the foregoing substituents are designated as being optionally substituted, the substituent groups which are optionally present may be any one or more of substituents which include for example, halogen atoms, nitro, cyano, thiocyanato, cyanato, hydroxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, amino, alkylamino, dialkylamino, formyl, alkoxycarbonyl, carboxyl, alkanoyl, alkylthio, alkylsulphinyl, alkylsulphonyl, carbamoyl, alkylamido, phenyl, phenoxy, benzyl, benzyloxy, heterocyclyl, especially furyl, and cycloalkyl, especially cyclopropyl, groups. Typically, 0-3 substituents may be present. When any of the foregoing substituents represents or contains an alkyl substituent group, this may be linear or branched and may contain up to 12, preferably up to 6, and especially up to 4, carbon atoms. When any of the foregoing substituents represents or contains an aryl or cycloalkyl moiety, the aryl or cycloalkyl moiety may itself be substituted by one or more halogen atoms, nitro, cyano, alkyl, haloalkyl, alkoxy or haloalkoxy groups. In the case of cycloalkyl and heterocyclyl groups, optional substituents also include groups which together with two adjacent carbon atoms of the cycloalkyl or heterocyclyl group form a saturated or unsaturated hydrocarbyl ring. In other words, a saturated or unsaturated hydrocarbyl ring may be optionally fused with the cycloalkyl or heterocyclyl group.

When any of the foregoing substituents represents or contains an aryl or cycloalkyl moiety, the aryl or cycloalkyl moiety may itself be substituted by one or more halogen atoms, nitro, cyano, alkyl, haloalkyl, alkoxy or haloalkoxy groups. In the case of cycloalkyl and heterocyclyl groups, optional substituents also include groups which together with two adjacent carbon atoms of the cycloalkyl or heterocyclyl group form a saturated or unsaturated hydrocarbyl ring. In other words, a saturated or unsaturated hydrocarbyl ring may be optionally fused with the cycloalkyl or heterocyclyl group.

Optionally substituted moieties may be unsubstituted or have from one up to the maximal possible number of substituents. Typically, 0 to 3 substituents are present.

The present invention accordingly provides a pharmaceutical composition which comprises a compound of this invention in combination or association with a pharmaceutically acceptable carrier. In particular, the present invention provides a pharmaceutical composition which comprises an effective amount of a compound of this invention and a pharmaceutically acceptable carrier. As used in accordance with this invention, the term providing an effective amount of a compound means either directly administering such compound, or administering a prodrug derivative, or analog which will form an effective amount of the compound within the body.

DESCRIPTION OF THE INVENTION

Compounds of this invention are prepared according to the procedures described in U.S. Pat. Nos. 5,593,996; 5,756,509;5,948,783; 5,981,534; 5,612,345; 5,994,360; 6,020,338; 5,985,883; 5,854,252; 5,808,066; 5,817,663; 5,955,252; 5,965,561; 5,986,135; and 5,750,766 which are hereby incorporated herein by reference.

Representative compounds of this invention were evaluated in several standard pharmacological test procedures that showed that the compounds of this invention possess significant activity as promoters of microtubule polymerization and are antineoplastic agents. Based on the activity shown in the standard pharmacological test procedures, the compounds of this invention are therefore useful as anticancer agents. Associated cancers are selected from the group consisting of breast, colon, lung, prostate, melanoma, epidermal, leukemia, kidney, bladder, mouth, larynx, esophagus, stomach, ovary, pancreas, liver, skin and brain. In particular the compounds of this invention possess an effect similar to Paclitaxel. The test procedures used and results obtained are shown below.

Cytotoxicity Standard Pharmacological Test Procedure Using MTS as Detection Reagent

This standard pharmacological test procedure identifies representative examples of substituted triazolopyrimidine compounds of the invention, which further includes compounds of Formula (I), which kill various human cancer cell lines. The test is based on the conversion by viable cells, but not by dead cells, of the tetrazolium salt, MTS, into a water-soluble colored formazan which is detected by spectrophotometry. The test procedure was used to identify the most potent compounds within a series of related structures which were known or suspected to have a microtubule mechanism of action. The most potent compounds were then taken forward into other test procedures which specifically analyzed effects on microtubules.

Part 1. Cytotoxicity with HeLa Cells

In the first cytotoxicity test, representative compounds of the invention were tested with the HeLa human cervical carcinoma cell line at a single concentration. HeLa cells (ATCC CCL2.2) were routinely maintained by twice-weekly subculture in fresh medium. Medium was RPMI-1640 with L-glutamine, supplemented with 10% heat-inactivated fetal calf serum, 100 units/ml penicillin, and 100 μg/ml streptomycin.

For assay, HeLa cells were harvested by trypsinization, washed, counted and distributed to wells of 96-well flat-bottom microtiter plates at 1000 cells per well in 100 μl of medium. The plates were incubated at 37° in humidified 5% CO ₂in air for about 24 hr.

On day 2, compounds for test were diluted and added to wells. Compounds were dissolved in dimethyl sulfoxide (DMSO) at 10 mg/ml. These solutions were diluted into medium to give solutions of 20 μg/ml, and then 100 μl was added in duplicate to wells already containing cells, to give final drug concentrations of 10 μg/ml and a final DMSO concentration of 0.1%. Each plate also contained the following controls: cells with no drug (uninhibited cell growth=maximal MTS response=control response); cells plus 100 nM paclitaxel (all cells killed=minimal MTS response); and medium only (MTS reagent control). The plates were returned to the incubator for three days.

After three days of culture with test compounds (day 5 overall), the MTS assay was done on all wells of the plates. Twenty μl of the combined MTS/PMS reagent (Promega “CellTiter 96 Aqueous Non-Radioactive Cell Proliferation Assay, ” catalog no. G5421; see Technical Bulletin No. 169, Revised 9/96) were added to each well with a repeating pipettor, and the plates were returned to the 37° incubator for 2 hr before recording the absorbance of each well at 490 nm using an ELISA plate reader.

The absorbance values of the duplicate sample wells were averaged and expressed as a percentage of the average value of the control wells. Percentages less than 100 indicated that the test compounds had exerted a cytotoxic effect on the cells. The results of this pharmacological test procedure are displayed in Table 1.

TABLE 1


Evaluation of Representative Compounds of the Invention in the
MTS Cytotoxicity Standard Pharmacological Test Procedure with
HeLa Cells

		Percent of Control
	Ex No.	at 10 ug/ml

	1	−1.6
	2	10.4
	4	2.9
	5	−0.8
	6	−0.4
	7	0.6
	8	2
	9	8.1
	12	0.3
	19	−1.3
	24	3.7
	27	2.2
	28	3.4
	30	−0.4
	32	20.3
	33	−1.3
	35	17.6
	37	−1.6
	38	0.2
	39	10.6
	41	7.1
	42	−0.1
	43	5.8
	47	0
	48	13.9
	49	12
	54	−0.1
	59	0.9
	60	4.9
	61	−1.2
	62	−0.7
	63	10.6
	64	−2
	65	−0.6
	66	−0.7
	70	1.4
	72	−1.8
	73	15.6
	79	7.1
	82	−1.5
	87	−0.2
	99	1.8
	102	1.1
	103	−0.7
	105	0
	113	−0.3
	116	−1.3
	117	−0.1
	121	−0.8
	122	2.1
	123	−2.2
	124	−1.6
	127	−0.9
	128	−0.3
	130	5.4
	132	3.4
	133	10.7
	135	−1.1
	140	−0.9
	141	10.8
	143	92.8
	144	2.3
	145	16.2
	146	16.1
	149	7.8
	150	3.4
	151	9.6
	157	−2.7
	158	−0.4
	159	−1
	160	1.1
	163	27.2
	167	−2.5
	168	8.7
	169	23.8
	170	22.6
	172	−0.9
	173	−0.6
	174	0.6
	175	1.9
	176	−0.6
	177	8.5
	180	−0.3
	181	−1.5
	182	−1.7
	183	−0.1
	184	1.3
	185	1.5
	186	1
	187	−1.4
	188	8.8
	189	2.2
	213	10.2
	216	5.8
	217	−0.5
	225	−1

Part 2. Cytotoxicity with COLO 205 Cells

In the second cytotoxicity standard pharmacological test procedure, representative compounds of the invention were tested with the COLO 205 human colon adenocarcinoma cell line at six concentrations, in order to determine IC ₅₀values. COLO 205 cells (ATCC CCL 222) were routinely maintained by thrice-weekly subculture in fresh medium. Medium was RPMI-1640 with L-glutamine, supplemented with 10% heat-inactivated fetal calf serum, 20 mM HEPES, 100 units/ml penicillin, and 100 μg/ml streptomycin.

For the test procedure, COLO 205 cells were harvested by trypsinization, washed, counted and distributed to wells of 96-well flat-bottom microtiter plates at 1000 cells per well in 100 μl of medium. In addition, one row of wells on an additional plate received cells as above (“time 0” plate). All plates were incubated at 37° in humidified 5% CO ₂in air for about 24 hr.

On day 2, compounds for test were diluted and added to wells.

Compounds were dissolved in DMSO at 10 mg/ml. For each compound, six serial 3-fold dilutions were prepared in medium. The highest drug concentration with cells was 5 μg/ml and the highest DMSO concentration was 0.05%. Drugs were added in duplicate to wells in 100 μl volume. Each plate also contained the following controls: cells with no drug (uninhibited cell growth=maximal MTS response); cells plus 100 nM paclitaxel (all cells killed=minimal MTS response); and medium only (MTS reagent control). The plates were returned to the incubator for three days.

At the time of drug addition to the experimental plates, the MTS assay was run on the “time 0” plate. This produced the “time 0 MTS value” which was related to the number of viable cells per well at the time of drug addition. The MTS values of the wells of the experimental plates were lower than, higher than, or the same as the time 0 value, depending on whether a drug killed the cells, did not inhibit cell growth, or was cytostatic, respectively.

After three days of culture with test compounds (day 5 overall), the MTS assay was done on all wells of the experimental plates. The results for each plate were calculated separately, using its own controls. The absorbance values of the duplicate sample wells were averaged and divided by the average of the “time 0” values. The average of the control wells without drug, divided by the average “time 0” value, gave the maximal relative increase in MTS color yield due to cell growth during the final three days of culture. The average of the control wells with paclitaxel, divided by the “time 0” value, gave the minimal relative color yield for cells that were completely killed. The six values for each compound were plotted against concentration, and the concentration that produced a relative color yield half way between the maximum and minimum was taken as the IC ₅₀value. The most potent compounds had the lowest IC₅₀values. Test results of representative compounds of the invention are displayed in Table 2.

In addition, some compounds of the invention were tested in duplicate at 25 and 50 μg/ml with COLO 205 cells in the MTS cytotoxicity pharmacological test procedure. Results were expressed as a percent of the average value of the control wells. Percentages less than 100 indicated that the test compounds had exerted a cytotoxic effect on the cells. These test results are also displayed in Table 2.

TABLE 2


Evaluation of Representative Compounds of the Invention in the MTS
Cytotoxicity Standard Pharmacological Test Procedure with COLO 205
Cells

IC50

% of Control At

Ex No.	(μg/ml)	n	25 μg/ml	50 μg/ml

1	0.84
2	0.092
3	0.82
4	0.082
5	0.057
6	0.16
7	0.12
8	3.3
9	0.86
10	0.35
11	2.5
12	0.32	2
13	4.3
14	0.22
15	1.2
16	4.8
17	0.91
18	0.33
19	0.25
20	1
21	2.8
22	4.6
23	3.7
24	>5
25	>5 a
26	0.33
27	0.033
28	0.08
29	0.29
30	0.31	2
31	2.8
32	>5
33	0.062
34	0.44
35	0.026	3
36	0.1
37	>5
38	2.5
39	2.2
40	0.31
41	0.062
42	0.33
43	0.084
44	0.64
45	4.8
46	0.31
47	0.11
48	0.13
49	0.15
50	2.1
51	0.86
52	0.7
53	1.3
54	0.094
55	0.59
56	0.86
57	0.64
58	1
59	0.18
60	0.19
61	0.095
62	0.13
63	0.16
64	0.68	2
65	0.18
66	0.11
67	0.34
68	1.7	2
69	0.36
70	0.22
71	0.87	2
72	0.22
73	0.13
74	0.31
75	4.3
76	0.37	2
77	0.66	2
78	2.4
79	0.27
80	2.6	2
81	2.5	2
82	0.038
83	3	2
84	2.8
85	2.8	2
86	0.26	2
87	0.24
88	2.8	2
89	2.9	2
90	1
91	0.39	2
92	1.8
93	2.7	2
94	3.5	2
95	3.8
96	0.79	2
97	>5 a
98	2	2
99	0.064
100	>5 a
101	4.4
102	2.3
103	0.27
104	0.25	2
105	0.12	2
106	>5 a
107	0.11	2
108	0.63	2
109	3.5
110	0.32	2
111	0.39	2
112	0.34
113	0.91
114	3.7
115	>5 a
116	>5
117	0.26
118	1.2	2
119	0.75	2
120	1.4	2
121	2.7
122	0.73
123	>5
124	0.12
125	4.7	2
126	0.14
127	0.056
128	2.6
129	0.31	2
130	0.91
131	0.1	2
132	0.084
133	0.092	2
134	0.33	2
135	0.16
136	0.55	2
137	1.2
138	0.34	2
139	0.96
140	0.075
141	0.28
142	0.29	2
143	0.097
144	0.084
145	2.5
146	0.099
147	1.2	2
148	0.36
149	0.056
150	0.28
151	0.099
152	1
153	0.42
154	1.2
155	1.1
156	0.11
157	>5
158	0.19
159	0.38
160	0.27
161	2.6
162	0.78
163	0.27
164	0.17
165	0.96
166	0.32
167	0.1
168	0.11
169	0.31	4
170	0.074	11
171	0.29
172	0.3
173	0.3
174	0.13
175	0.038	3
176	0.1
177	0.13
178	0.099	3
179	0.35
180	0.81
181	0.043
182	1.3
183	0.078
184	0.25
185	0.04
186	0.034
187	0.035
188	0.012	2
189	0.055
190	0.33
191	0.032
192	>5 a
193	0.95
194	0.58
195	0.1
196	0.15
197	0.3
198	0.091	3
199	0.38
200	0.27
201	0.39
202	0.25
203	0.17
204	0.12
205	0.036
206	0.12
207	0.035
208	0.014	2
209	0.11
210	0.31
211	0.049	3
212	0.88
213	0.47
214	0.79
215	3.5
216	0.63
217	0.2
218	>5 a
219	0.89
220	4.9
221	2.8
222	5	2
223	2.1
224	0.3
225	0.086
226	0.095
227	4.3
228	>5 a
229	0.95	2
230	2.5
231			44.3	6.6
232			67.5	15.0
233			27.3	20.4
234			5.6	−4.5
235			80.6	14.7
236			28.4	10.9
237			24.1	−3.5
238			100.4	41.5
239			58.8	25.5
240			−0.9	−4.0
241			2.3	2.4
242			13.1	−4.8
243			12.7	−3.0
244			9.2	21.0
245			100.3	72.5
246			4.0	−4.8
247			63.6	46.4
248			15.5	−3.9
249			47.4	20.3
250			16.4	4.6
251			103.9	28.1
252			94.8	69.6
253			120.0	74.1
254			39.6	15.6
255			58.3	86.1
256			20.2	14.8
257			27.3	−3.5
258			74.6	44.1
259			32.6	0.7
260			87.8	53.5
261			7.4	−3.9
262			23.7	−5.1
263			−1.5	2.0
264			34.5	−4.2
265			8.1	−1.6
266			84.9	72.4
267			17.8	32.1
268			−0.8	4.2
269			3.5	11.9
270	0.095
271	0.32
272	0.91
273	1
274	1.9
275	0.13

Part 3. Cytotoxicity with H157, U87MG, PC-3 MM2, and DLD1 Cells

The cytotoxicity standard pharmacological test procedure with MTS detection was applied to representative compounds of the invention with four additional human cancer cell lines in order to characterize the range of tumor types against which the compounds were active. The cell lines used were H157 human non-small cell lung carcinoma, U87MG human glioblastoma, PC-3 MM2 human prostate carcinoma, and DLD1 human colon adenocarcinoma. The procedure of the test and the method of data calculation were the same as described above in Part 2 with COLO 205 cells. The results are displayed in Table 3.

TABLE 3


Evaluation of Representative Compounds of the Invention and Standard
Cytotoxic Agents in the MTS Cytotoxicity Standard Pharmacological Test
Procedure with Four Human Cancer Cell Lines

IC₅₀(nM)

Example	H157	U87MG	PC-3 MM2	DLD1

35	31	390	220	105
169		>1000	>1000
170	310	200	140	560
175		180	240	215
178		480	550
186	38
187	86
188	16	48	73	48
198		640	580
205	83
208	10	120	140	69
211		370	400
Camptothecin	10
Colchicine	13	6.5	10	25
Doxorubicin	17			170
Mitoxantrone	13
Nocodazole	33	34	43	40
Paclitaxel			0.17	1.4
Vincristine	0.28		0.30	3.0

Part 4. Cytotoxicity with KB Cells and Drug-Resistant Lines Derived from KB

The cytotoxicity standard pharmacological test procedure with MTS detection was applied to representative compounds of the invention with the KB human epidermoid carcinoma cell line and two multidrug resistant lines derived from it. These derived lines were colchicine-resistant KB 8.5, which expresses a moderate level of the multidrug transporter P-glycoprotein, and vinblastine-resistant KB VI, which expresses a high level of P-glycoprotein. The purpose of these experiments was to determine if the compounds were able to overcome drug resistance mediated by P-glycoprotein. If the IC ₅₀'s of the compounds are essentially the same on all three lines, then the compounds are not substrates of P-glycoprotein. If on the other hand, the compounds have much higher IC₅₀'s on KB 8.5 and KB VI compared to KB (as do paclitaxel, vincristine, and many other standard anti-cancer drugs) then they would be substrates of P-glycoprotein.

The procedure of the cytotoxicity test and the method of data calculation were the same as described above in Part 2 with COLO 205 cells. The results are displayed in Table 4. The results show that the compounds of this invention have essentially the same IC ₅₀'s on all three cell lines, indicating that they would not be subject to multidrug resistance mediated by P-glycoprotein.

TABLE 4


Evaluation of Representative Compounds of the Invention and
Standard Cytotoxic Agents in the MTS Cytotoxicity Standard
Pharmacological Test Procedure with Human Cancer Cell Lines
that Overexpress the P-glycoprotein Transporter

IC₅₀(nM)

Relative Resistance

Example	KB	KB 8.5	KB VI	KB	KB 8.5	KB VI

35	19	31	16	1	1.6	0.8
186	30	48	33	1	1.6	1.1
187	45	76	56	1	1.7	1.2
188	10	18	11	1	1.8	1.1
Taxol	<0.03	19	3,325	1	>630	>111,000
Vincristine	<0.06	29	3,150	1	>480	>52,500
Colchicine	7.2	51	1,330	1	7.1	185
Nocodazole	21	24	33	1	1.1	1.6
Doxorubicin	34	101	4,400	1	3.0	130

Part 5. Cytotoxicity with S1 Cells and a Drug-Resistant Line Derived from S1

The cytotoxicity standard pharmacological test procedure with MTS detection was applied to representative compounds of the invention with the S1 human colon carcinoma cell line and a multidrug resistant line derived from it. The derived line was mitoxantrone-resistant S1-M1, which expresses the multidrug transporter MXR. The purpose of these experiments was to determine representative compounds of the invention able to overcome drug resistance mediated by MXR. If the IC ₅₀'s of the compounds are essentially the same on both lines, then the compounds are not substrates of MXR. If on the other hand, the compounds have much higher IC₅₀'s on S1-M1 compared to S1 (as do many standard anti-cancer drugs) then they would be substrates of MXR.

The procedure of the cytotoxicity test and the method of data calculation were the same as described above in Part 2 with COLO 205 cells. The results are displayed in Table 5. The results show that the compounds of this invention have essentially the same IC ₅₀'s on both cell lines, indicating that they would not be subject to multidrug resistance mediated by MXR.

TABLE 5


Evaluation of Representative Compounds of the Invention and Standard
Cytotoxic Agents in the MTS Cytotoxicity Pharmacological Test
Procedure with a Human Cancer Cell Line that Overexpresses the MXR
Transporter Protein

			Relative
	IC₅₀(nM)		Resistance

Example	S1	S1-M1	S1	S1-M1

35	73	94	1	1.3
186	99	102	1	1.0
187	99	124	1	1.3
188	33	74	1	2.2
Colchicine	11	47	1	4.3
Nocodazole	43	146	1	3.4
Doxorubicin	19	10,700	1	565
Mitoxantrone	<4	>10,000	1	>2,500
Camptothecin	6.8	21	1	3.1

Inhibition of Cellular Prolieration Standard Pharmacological Test Procedure Using Sulforhodamine B as Detection Reagent

This standard pharmacological test procedure measures the ability of compounds to inhibit cellular proliferation. Sulforhodamine B staining was used to estimate total cellular protein in each culture after exposure to compounds. A decrease in staining compared to untreated control cultures indicated an inhibition of proliferation.

Two cell lines were used in these experiments: Reh human acute lymphocytic leukemia, and CCRF-CEM human acute lymphoblastic leukemia, both obtained from ATCC. Two types of experiments were done on each of the two cell lines. In the first, cells were cultured with Example 170 at several concentrations for either 24 or 72 hr, and the effect on cellular proliferation was determined. In the second, cells were cultured with Example 170 at several concentrations for 24 hr, the compound was removed and replaced with fresh medium without compound, culture was continued for another 48 hr, and the effect on cellular proliferation was determined. This second experiment determined the ability of cells to recover from the damage inflicted by compound during the first 24 hr of culture. At the end of the incubation periods, cells were fixed with trichloroacetic acid and stained with sulforhodamine B using the in vitro Toxicology Assay Kit (Sigma). Actinomycin D was used as a positive control in all experiments. Bound dye was measured spectrophotometrically at 565 nm with a reference wavelength of 690 nm. Cultures were done in 96-well assay plates with five replicates of each concentration. The absorbance values of the replicates were averaged and expressed as a percent of the vehicle control. Each experiment was repeated once, and the percent of control for a given concentration in each experiment were averaged to calculate the results displayed in Table 6.

The results showed that Example 170 inhibited the proliferation of both cell lines, with a greater effect observed after 72 hr compared with 24 hr. In addition, the recovery experiment showed that neither cell line could recover from the toxicity induced by 24 hr of culture with Example 170.

An additional experiment was done with HL-60 human promyelocytic leukemia in which the inhibition of cellular proliferation by several concentrations of Example 170 were determined after 24 or 72 hrs of culture using the Sulforhodamine B test procedure as described above. Concentrations of Example 170 ranged from 0.005-100 μg/ml. The calculated EC ₅₀value at 24 hr was 2.3 μg/ml, and the EC₅₀value at 72 hr was 0.1 μg/ml.

TABLE 6


Evaluation of Example 170 in the Sulforhodamine B Standard
Pharmacological Test Procedure with Two Human Leukemia
Cell Lines

Percent of Control

Reh Cells

CCRF-CEM Cells

			24 hr			24 hr
	24 hr.	72 hr	Treatment	24 hr	72 hr	Treatment
Conc.	Treat-	Treat-	48 hr	Treat-	Treat-	48 hr
(μg/ml)	ment	ment	Recovery	ment	ment	Recovery

0.005	120.15	88.57	105.29	104.86	94.88	152.66
0.01	110.83	89.43	103.98	111.05	88.98	143.58
0.05	81.50	71.31	81.23	67.31	19.73	57.05
0.1	68.67	65.87	84.68	65.48	24.04	38.99
0.5	67.70	66.24	74.13	65.72	11.59	50.17
1	83.94	52.91	66.81	51.41	20.74	29.42
5	66.21	41.86	61.34	30.04	22.24	28.90
10	71.46	44.70	34.10	42.05	8.17	18.19
50	55.07	35.40	36.36	47.10	24.84	27.16
100	84.35	51.62	35.76	113.70	54.07	39.47
0.2*	66.99	50.54	39.75	52.44	45.71	20.26

Cell Cycle Analysis Standard Phamacological Test Procedure

This standard pharmacological test procedure measures the percentages of cells in a population that are in the G1, S and G2/M phases of the cell cycle. It utilizes staining of fixed cells with propidium iodide and analysis of these cells by flow cytometry. The procedure also gives an estimate of apoptosis induction caused by drug treatment by measurement of the appearance of particles with sub-G1 amounts of DNA. Microtubule-active drugs characteristically arrest cells in the G2/M phase of the cell cycle because of disruption of the function of the microtubules that comprise the mitotic spindle.

HeLa cells were maintained in RPMI-1640 medium with L-glutamine, supplemented with 10% heat-inactivated fetal calf serum, 100 units/ml penicillin, and 100 μg/ml streptomycin. For assay, cells were harvested by trypsinization, washed, counted and distributed to wells of a 6-well plate at 50,000 cells per well in 3 ml of medium. Cells were cultured overnight at 37° in humidified 5% CO ₂in air.

On day 2, compounds for test were diluted and added to wells at the final concentrations given in the tables. Twenty hours after drug addition, cells from each well were harvested, fixed with cold 80% ethanol, treated with 100 μg/ml RNAse and stained with propidium iodide before analysis by flow cytometry. The percentages of total cells in G1, S, G2/M, and apoptosis (sub-G1 population) were estimated from the fluorescence histograms, and compared with those determined using untreated control cells in the same assay.

Table 7 displays results for representative compounds of this invention tested at a low concentration and at a five-fold higher concentration. Table 8 displays results of a second experiment in which representative compounds were tested at six concentration levels each. In both experiments the compounds caused a profound increase in the percentage of cells in the G2/M phase of the cell cycle and induced substantial apoptosis.

TABLE 7


Evaluation of Representative Compounds of the Invention in the Cell
Cycle Analysis Standard Pharmacological Test Procedure with
HeLa Cells

Conc.

Percent Cell Cycle Phase

	Example	(μg/mL)	Apop	G1	S	G2/M

None	—	3	64	18	16
	—	2	63	18	17
1	0.84	8	3	10	79
	4.2	13	7	12	68
5	0.057	44	10	22	25
	0.285	9	1	5	85
7	0.12	8	2	6	84
	0.6	9	3	8	81
9	0.86	10	2	7	81
	4.3	16	28	21	35
12	0.27	46	10	18	26
	1.35	7	1	7	85
27	0.033	28	4	13	55
	0.165	8	1	5	86
35	0.022	28	5	14	54
	0.11	—	—	—
39	2.19	26	4	15	55
	10.95	19	17	20	45
41	0.062	9	58	20	13
	0.31	34	18	17	30
42	0.33	47	14	20	19
	1.65	6	1	10	83
47	0.11	8	2	8	83
	0.55	7	1	10	81
59	0.18	43	8	24	26
	0.9	8	2	6	84
61	0.08	7	1	9	83
	0.4	7	2	8	83
105	0.08	12	3	11	74
	0.4	6	2	8	84
127	0.08	8	2	12	79
	0.4	6	3	6	84
151	0.08	15	4	14	67
	0.4	9	6	8	76
186	0.08	7	2	8	82
	0.4	7	2	10	80
187	0.08	6	4	9	81
	0.4	7	2	9	81
188	0.08	9	2	8	81
	0.4	9	2	10	78

TABLE 8


Evaluation of Representative Compounds of the Invention in the Cell
Cycle Analysis Standard Pharmacological Test Procedure with
HeLa Cells

Conc.

Percent Cell Cycle Phase

	Example	(μg/mL)	Apop	G1	S	G2/M

None	—	4	55	23	18
	—	3	49	25	20
	—	1	56	20	20
35	0.001	1	57	22	20
	0.003	1	58	22	18
	0.01	2	57	20	21
	0.03	29	20	25	25
	0.1	26	9	13	50
	0.3	4	4	3	89
133	0.01	4	54	19	23
	0.03	28	25	21	25
	0.1	34	9	26	29
	0.3	15	5	8	73
	1	3	4	3	90
	3	3	4	3	89
169	0.01	2	51	23	24
	0.03	14	41	21	24
	0.1	33	17	23	25
	0.3	34	8	24	32
	1	3	5	3	88
	3	4	5	2	88
170	0.01	13	42	21	24
	0.03	33	17	20	28
	0.1	27	3	18	50
	0.3	5	5	4	85
	1	3	4	4	88
	3	3	4	4	88
188	0.001	1	55	21	23
	0.003	2	56	18	23
	0.01	18	35	19	27
	0.03	27	7	14	52
	0.1	4	4	3	88
	0.3	3	3	3	90
208	0.001	2	59	20	20
	0.003	2	57	20	21
	0.01	14	43	20	23
	0.03	33	8	21	36
	0.1	3	2	3	90
	0.3	3	3	2	91

Tubulin Polymerization Standard Pharmacological Test Procedure Using Highly Purified Tubulin

This standard pharmacological test procedure determines the activity of representative compounds of this invention in promoting the polymerization of α/β tubulin heterodimers. The tubulin preparation used was over 99% pure so that any effects of test compounds on polymerization must be due to direct binding of the test compounds to tubulin protein. It is well known that in this assay paclitaxel promotes polymerization compared to the control reaction without drug, and that vincristine and colchicine inhibit polymerization. Highly purified tubulin does not exhibit substantial spontaneous polymerization at protein concentrations between 1 and 2 mg/ml. Therefore an agent such as glycerol is added to the reactions to lower the critical concentration for polymerization and yield a higher spontaneous control polymerization. In some experiments described below, either glycerol or guanosine 5′-triphosphate (the energy source of polymerization) was left out of the reaction mixtures in order to better compare the effects of paclitaxel and representative compounds of this invention.

Part 1. Polymerization of Purified Tubulin in the Presence of Guanosine 5′-triphosphate and Glycerol

Bovine brain tubulin, purchased from Cytoskeleton, Inc., was greater than 99% pure by polyacrylamide gel electrophoresis. The protein was dissolved at 1.5 mg/ml in ice-cold GPEM buffer (80 mM piperazine-N,N′-bis[2-ethanesulfonic acid], pH 6.9, 1 mM ethylene glycol-bis(β-aminoethyl ether)-N,N,N′,N′-tetraacetic acid, 1 mM magnesium chloride, 1 mM guanosine 5′-triphosphate, GTP) containing 10% (w/w) glycerol. The solution was centrifuged at top speed in an Eppendorf model 5415C microfuge for 10 min at 4° immediately before use. The tubulin solution was added to wells of a ½ area 96-well plate (Costar No. 3696) already containing the compounds of interest. Each compound was assayed at three concentrations as indicated. Final volume per well was 110 μl. Each sample was done in duplicate, and the control reaction, which received drug solvent only, was done in quadruplicate. The highest concentration of DMSO in any reaction was 1%. The plate was put in a Molecular Devices SpectraMax plate reader thermostated at 35° and the absorbance of each well at 340 nm was determined every minute for 60 minutes. The absorbance at time 0 for each well was subtracted from each of the subsequent absorbance readings for that well, and then the duplicates were averaged.

The results of this standard pharmacological test procedure with representative compounds of this invention and with standard microtubule-active drugs are displayed in Tables 9 to 14. Compounds that enhanced the rate and/or extent of purified tubulin polymerization compared to the control (as does paclitaxel) were judged to be promoters of polymerization; compounds that reduced the rate or extent of polymerization (e.g., vincristine, colchicine) were judged to be inhibitors.

TABLE 9


Evaluation of Examples 35 and 188 in the Tubulin Polymerization
Standard Pharmacological Test Procedure
ΔA₃₄₀

Time

Example 35

Example 188

(min)	10 μM	1 μM	0.1 μM	10 μM	1 μM	0.1 μM	Control

0	0	0	0	0	0	0	0
5	0.0434	0.0003	0.0004	0.0179	−0.0007	−0.0006	−0.0009
10	0.0972	0.0015	0.0010	0.0469	0.0001	−0.0005	−0.0008
15	0.1219	0.0028	0.0012	0.0667	0.0016	−0.0001	0.0001
20	0.1316	0.0058	0.0024	0.0813	0.0040	0.0009	0.0019
25	0.1364	0.0079	0.0041	0.0919	0.0063	0.0026	0.0051
30	0.1387	0.0106	0.0061	0.0988	0.0110	0.0052	0.0087
35	0.1397	0.0139	0.0079	0.1032	0.0141	0.0079	0.0132
40	0.1401	0.0177	0.0099	0.1064	0.0179	0.0119	0.0198
45	0.1392	0.0232	0.0133	0.1100	0.0229	0.0142	0.0221
50	0.1396	0.0278	0.0167	0.1149	0.0288	0.0203	0.0245
55	0.1399	0.0311	0.0193	0.1165	0.0337	0.0262	0.0282
60	0.1398	0.0350	0.0224	0.1176	0.0372	0.0304	0.0340

TABLE 10


Evaluation of Example 170 and Paclitaxel in the Tubulin
Polymerization Standard Pharmacological Test Procedure
ΔA₃₄₀

Time

Example 170

Paclitaxel

(min)	10 μM	1 μM	0.1 μM	10 μM	1 μM	0.1 μM	Control

0	0	0	0	0	0	0	0
5	0.0103	−0.0001	−0.0005	0.0136	0.0044	−0.0012	−0.0009
10	0.0555	0.0008	−0.0010	0.0416	0.0167	−0.0010	−0.0008
15	0.0923	0.0028	−0.0005	0.0704	0.0336	0.0001	0.0001
20	0.1100	0.0056	0.0002	0.0931	0.0500	0.0025	0.0019
25	0.1199	0.0093	0.0018	0.1075	0.0638	0.0060	0.0051
30	0.1257	0.0143	0.0041	0.1162	0.0748	0.0100	0.0087
35	0.1289	0.0198	0.0053	0.1216	0.0835	0.0123	0.0132
40	0.1330	0.0246	0.0088	0.1245	0.0903	0.0168	0.0198
45	0.1353	0.0291	0.0124	0.1269	0.0957	0.0229	0.0221
50	0.1353	0.0338	0.0155	0.1279	0.0997	0.0257	0.0245
55	0.1363	0.0380	0.0192	0.1279	0.1027	0.0293	0.0282
60	0.1364	0.0419	0.0241	0.1282	0.1053	0.0314	0.0340

TABLE 11


Evaluation of Examples 169 and 175 in the Tubulin Polymerization
Standard Pharmacological Test Procedure
ΔA₃₄₀

Time

Example 169

Example 175

(min)	10 μM	1 μM	0.1 μM	10 μM	1 μM	0.1 μM	Control

0	0	0	0	0	0	0	0
5	0.0239	0.0005	−0.0014	0.0073	0.0001	−0.0012	−0.0012
10	0.1172	0.0011	−0.0009	0.0199	0.0014	−0.0005	−0.0011
15	0.1435	0.0024	0.0001	0.0309	0.0037	0.0011	0.0000
20	0.1509	0.0045	0.0020	0.0399	0.0067	0.0025	0.0024
25	0.1532	0.0073	0.0042	0.0488	0.0102	0.0057	0.0051
30	0.1548	0.0106	0.0057	0.0566	0.0160	0.0088	0.0108
35	0.1554	0.0154	0.0105	0.0638	0.0217	0.0116	0.0157
40	0.1555	0.0197	0.0136	0.0704	0.0294	0.0177	0.0203
45	0.1552	0.0246	0.0186	0.0761	0.0349	0.0233	0.0246
50	0.1545	0.0331	0.0234	0.0817	0.0416	0.0261	0.0329
55	0.1561	0.0414	0.0282	0.0872	0.0450	0.0309	0.0369
60	0.1552	0.0456	0.0322	0.0919	0.0485	0.0373	0.0392

TABLE 12


Evaluation of Example 178 and Paclitaxel in the Tubulin
Polymerization Standard Pharmacological Test Procedure

A₃₄₀

Time

Example 178

Paclitaxel

(min)	10 μM	1 μM	0.1 μM	10 μM	1 μM	0.1 μM	Control

0	0	0	0	0	0	0	0
5	0.0182	−0.0029	−0.0001	0.0200	0.0024	−0.0008	−0.0012
10	0.0304	−0.0021	0.0000	0.0587	0.0144	0.0005	−0.0011
15	0.0448	−0.0007	0.0002	0.0939	0.0315	0.0031	0.0000
20	0.0602	0.0006	0.0009	0.1199	0.0484	0.0070	0.0024
25	0.0770	0.0039	0.0030	0.1369	0.0626	0.0103	0.0051
30	0.0951	0.0064	0.0055	0.1470	0.0746	0.0159	0.0108
35	0.1099	0.0110	0.0080	0.1522	0.0838	0.0197	0.0157
40	0.1250	0.0152	0.0134	0.1557	0.0913	0.0256	0.0203
45	0.1360	0.0202	0.0216	0.1583	0.0969	0.0304	0.0246
50	0.1424	0.0242	0.0218	0.1584	0.1014	0.0336	0.0329
55	0.1488	0.0273	0.0229	0.1588	0.1050	0.0368	0.0369
60	0.1538	0.0316	0.0299	0.1586	0.1076	0.0399	0.0392

TABLE 13


Evaluation of Examples 198 and 211 and Paclitaxel in the Tubulin
Polymerization Standard Pharmacological Test Procedure

ΔA₃₄₀

Example 198

Example 211

Paclitaxel

*	10 μM	1 μM	0.1 μM	10 μM	1 μM	0.1 μM	10 μM	1 μM	0.1 μM	**

0	0	0	0	0	0	0	0	0	0	0
5	0.0011	0.0001	0.0021	−0.0008	−0.0019	−0.0001	0.0145	0.0037	−0.0014	−0.0012
10	0.0025	0.0006	0.0053	−0.0006	−0.0017	0.0014	0.0496	0.0173	0.0032	−0.0014
15	0.0057	0.0017	0.0096	0.0009	0.0000	0.0043	0.0857	0.0381	0.0056	−0.0001
20	0.0117	0.0046	0.0143	0.0029	0.0027	0.0080	0.1119	0.0572	0.0098	0.0031
25	0.0206	0.0071	0.0200	0.0055	0.0060	0.0129	0.1280	0.0731	0.0160	0.0077
30	0.0303	0.0106	0.0239	0.0085	0.0107	0.0173	0.1370	0.0860	0.0217	0.0124
35	0.0407	0.0153	0.0292	0.0121	0.0138	0.0228	0.1427	0.0961	0.0289	0.0193
40	0.0489	0.0214	0.0367	0.0165	0.0195	0.0287	0.1462	0.1041	0.0360	0.0223
45	0.0572	0.0258	0.0393	0.0211	0.0251	0.0321	0.1483	0.1102	0.0431	0.0288
50	0.0661	0.0320	0.0495	0.0263	0.0279	0.0397	0.1495	0.1148	0.0488	0.0345
55	0.0729	0.0360	0.0556	0.0320	0.0339	0.0458	0.1505	0.1185	0.0544	0.0389
60	0.0763	0.0413	0.0607	0.0383	0.0393	0.0512	0.1508	0.1211	0.0596	0.0440

TABLE 14


Evaluation of Vincristine, Colchicine, and Paclitaxel in the Tubulin
Polymerization Standard Pharmacological Test Procedure

ΔA₃₄₀

Vincristine

Colchicine

Paclitaxel

*	10 μM	1 μM	0.1 μM	10 μM	1 μM	0.1 μM	10 μM	1 μM	0.1 μM	**

0	0	0	0	0	0	0	0	0	0	0
5	−0.0011	−0.0008	0.0016	0.0005	−0.0003	−0.0011	0.0104	0.0023	−0.0008	−0.0016
10	0.0001	−0.0007	0.0012	0.0011	0.0000	−0.0012	0.0372	0.0128	0.0020	−0.0013
15	−0.0001	−0.0007	0.0018	0.0006	0.0002	−0.0008	0.0658	0.0288	0.0084	0.0007
20	−0.0006	−0.0001	0.0031	−0.0001	0.0009	0.0003	0.0885	0.0434	0.0107	0.0027
25	−0.0012	0.0003	0.0044	−0.0003	0.0019	0.0024	0.1040	0.0568	0.0160	0.0054
30	−0.0015	0.0012	0.0074	−0.0008	0.0029	0.0058	0.1149	0.0682	0.0251	0.0103
35	−0.0018	0.0019	0.0119	−0.0008	0.0039	0.0086	0.1218	0.0779	0.0321	0.0181
40	−0.0017	0.0029	0.0154	−0.0012	0.0044	0.0119	0.1261	0.0857	0.0366	0.0232
45	−0.0020	0.0041	0.0189	−0.0016	0.0057	0.0159	0.1299	0.0920	0.0423	0.0272
50	−0.0025	0.0057	0.0253	−0.0020	0.0067	0.0209	0.1313	0.0975	0.0480	0.0300
55	−0.0026	0.0067	0.0298	−0.0020	0.0079	0.0243	0.1325	0.1015	0.0517	0.0362
60	−0.0026	0.0079	0.0322	−0.0021	0.0090	0.0274	0.1335	0.1049	0.0550	0.0399

Part 2. Polymerization of Purified Tubulin in the Absence of Either Guanosine 5′-triphosphate or Glycerol

This standard pharmacological test procedure measures the ability of a representative example of the invention to induce polymerization of purified tubulin in the absence of glycerol or guanosine 5′-triphosphate (GTP). All other conditions and data calculation were as given above in Part 1.

In the first experiment, the polymerization reaction mixture did not contain glycerol. In the absence of glycerol, highly purified tubulin undergoes very little spontaneous polymerization but paclitaxel is known to induce polymerization under these conditions. The data displayed in Table 15 show that Example 170 also induced polymerization in the absence of glycerol.

In the second experiment, GTP was absent from the reaction mixture. Normal tubulin polymerization requires energy released from GTP hydrolysis to drive subunit assembly, but paclitaxel is able to induce polymer formation even in the absence of GTP. The data displayed in Table 16 show that Example 170 also induced polymerization in the absence of GTP.

The results of both these experiments are consistent with the conclusion that Example 170 has a paclitaxel-like mechanism of action on tubulin polymerization.

TABLE 15


Evaluation of Example 170 and Paclitaxel in the Tubulin Polymerization
Standard Pharmacological Test Procedure in the absence of glycerol

ΔA₃₄₀

Example 170

Paclitaxel

Time (min)	10 μM	1 μM	10 μM	1 μM	Control

0	0	0	0	0	0
5	0.0019	0.0005	0.0056	0.0014	0.0002
10	0.0049	0.0014	0.0279	0.0091	0.0007
15	0.0095	0.0024	0.0546	0.0198	0.0011
20	0.0153	0.0039	0.0801	0.0310	0.0018
25	0.0215	0.0054	0.1016	0.0412	0.0024
30	0.0280	0.0074	0.1188	0.0500	0.0033
35	0.0347	0.0097	0.1070	0.0576	0.0043
40	0.0422	0.0121	0.1142	0.0638	0.0048
45	0.0504	0.0149	0.1192	0.0691	0.0058
50	0.0595	0.0188	0.1238	0.0737	0.0069
55	0.0687	0.0222	0.1262	0.0773	0.0077
60	0.0783	0.0264	0.1293	0.0805	0.0094

TABLE 16


Evaluation of Example 170 and Paclitaxel in the Tubulin Polymerization
Standard Pharmacological Test Procedure in the absence of GTP

ΔA₃₄₀

Example 170

Paclitaxel

Time (min)	20 μM	5 μM	20 μM	5 μM	Control

0	0	0	0	0	0
5	0.0364	0.0000	0.0204	0.0032	−0.0010
10	0.0582	0.0009	0.0592	0.0160	−0.0004
15	0.0735	0.0028	0.0933	0.0305	0.0019
20	0.0830	0.0046	0.1159	0.0445	0.0035
25	0.0921	0.0078	0.1288	0.0570	0.0078
30	0.1022	0.0107	0.1365	0.0674	0.0121
35	0.1086	0.0142	0.1409	0.0764	0.0167
40	0.1125	0.0180	0.1435	0.0843	0.0198
45	0.1192	0.0220	0.1449	0.0908	0.0241
50	0.1225	0.0265	0.1457	0.0962	0.0276
55	0.1264	0.0310	0.1456	0.1008	0.0333
60	0.1277	0.0357	0.1455	0.1046	0.0387

Immunofluorescence Standard Test Procedure for Analysis of Effects of Compounds on Morphology of Mitotic Spindle Microtubules in Cells

Compounds that bind to tubulin or microtubules typically have profound and characteristic effects on the structure of the microtubules which comprise the mitotic spindle of dividing cells. Compounds such as vincristine and colchicine that inhibit normal tubulin polymerization cause a severe disruption and even disappearance of spindle microtubules. On the other hand, compounds such as paclitaxel that promote tubulin polymerization and stabilize microtubules cause the appearance of dense tubulin bundles or aggregates. These effects of compounds can be visualized by immunofluorescent staining of fixed cells.

PC-3 MM2 human prostate carcinoma cells were plated at 5×10 ⁴cells/chamber in 8-chamber microscope slides that had been treated with poly-D-lysine (Biocoat 8-well CultureSlide, Becton Dickinson). The cells were allowed to attach and grow for 24 hr before addition of compounds at the indicated concentrations. After an additional 18-20 hr of culture with compounds, cells were fixed directly on the slides with methanol at minus 20°, rehydrated in phosphate-buffered saline, and stained with a mouse monoclonal antibody to α-tubulin (clone DM 1A, Sigma) followed by F(ab′)₂fragments of goat anti-mouse IgG, FITC conjugate (Jackson Immunoresearch). Cells were also stained with Hoescht 33258 to visualize DNA. Cells were viewed with a Zeiss fluorescence microscope under epi-illumination, and digital images were captured with a MTI Model DC330 video camera using Optimas V software. Images were processed using Corel PhotoPaint.

As displayed in Table 17, representative compounds or this invention produced marked bundling or aggregation of spindle microtubules in dividing cells. The patterns of microtubule bundling were similar to that produced by paclitaxel. When tested at equi-potent concentrations (i.e., at a concentration of each compound equal to eight times its IC ₅₀value in the 3-day MTS cytotoxicity assay), paclitaxel produced predominantly bipolar structures in which the microtubules appeared to be shortened and condensed. The compounds of this invention typically produced two, three, or four dense, circular bundles with intense fluorescence. The microtubule disrupting agents, vincristine and colchicine, produced patterns that were quite distinct from the compounds described here. These results are consistent with the conclusion that the compounds of this invention promote tubulin polymerization, as does paclitaxel.

TABLE 17


Evaluation of Representative Compounds of this Invention on Morphology
of Mitotic Spindle Microtubutes in PC-3 MM2 Cells Determined by the
Immunofluorescence Standard Pharmacological Test Procedure

	Con-
	cent-
	ration
Ex.	(μM)	Appearance of Mitotic Spindle Microtubules

35	0.54	Less tightly condensed, greater variety of abnormal
		structures, including “tangled spaghetti”
169	6.41	Dense, compact, highly fluorescent bundles, roughly
		circular in shape, 2-4 per cell
170	1.74	Dense, compact, highly fluorescent bundles, roughly
		circular in shape, 2-4 per cell
175	0.74	Dense, compact, highly fluorescent bundles, roughly
		circular in shape, 2-4 per cell
178	1.91	Rigid spikes emanating from a central core:
		“sea urchin”appearance
188	0.24	Dense, compact, highly fluorescent bundles, roughly
		circular in shape, 2-4 per cell
198	2.10	Dense, compact, highly fluorescent bundles, roughly
		circular in shape, 2-4 per cell
208	0.26	Dense, compact, highly fluorescent bundles, roughly
		circular in shape, up to 8 per cell
211	0.89	Dense, compact, highly fluorescent bundles, roughly
		circular in shape, 2-4 per cell
Paclitaxel	0.016	Dense, compact, highly fluorescent bundles,
		typically bipolar
Vincristine	0.008	Multiple abnormal structures, many resembling
		partially disrupted spindles
Colchicine	0.064	Almost completely depolymerized microtubules,
		sometimes with multiple small flecks of brighter
		fluorescence

Standard Pharmacological Test Procedure of Antitumor Activity in Athymic Mice Bearing Human Tumor Xenografts

The tumors used were H157 human non-small cell lung carcinoma, U87MG human glioblastoma, LOX human melanoma, and DLD1 human colon adenocarcinoma. Cells were cultured in RPMI-1640 medium with L-glutamine, supplemented with 10% heat-inactivated fetal calf serum, 100 units/ml penicillin and 100 μg/ml streptomycin. Cells were injected subcutaneously into the flank of outbred nu/nu mice. About 5 days later tumors were staged and those around 100 mg were selected for use. Tumor weights were calculated from measurements of length in two dimensions.

Compounds for test were prepared in Klucel and administered to mice by intraperitoneal injection (0.5 ml volume) or by oral gavage (0.2 ml volume). Typically, the compounds of this invention were given twice per day for 14 days at the doses indicated in the tables. Each experimental group contained 10 animals unless otherwise indicated. The control group (also 10 animals) received Klucel only. Tumor weights were estimated every 3 to 5 days in most experiments (every 7 days in one experiment).

Individual experiments are displayed in Tables 18-28.

TABLE 18


Evaluation of Example 170 on Growth of Human H157 Non-small
Cell Lung Carcinoma in Athymic Mice: Comparison of
Intraperitoneal and Oral Dosing

Treatment	Parameter	Day 0	Day 7	Day 10	Day 14	Day 16	Day 18	Day 21

Klucel	MTW	121	509	756	1298	1583	1752	2879
Ex. 170	MTW	128	221	287	567	755	1163	2467
25 mg/kg	T/C	1.05	0.43	0.38	0.44	0.48	0.66	0.86
bid, ip	p		0.001	0.001	0.001	0.009	0.062	0.282
Ex. 170	MTW	125	191	235	489	591	816	1835
25 mg/kg	T/C	1.03	0.37	0.31	0.38	0.37	0.47	0.64
bid, po	p		0.0005	0.0003	0.0003	0.0025	0.0065	0.052

TABLE 19


Evaluation of Example 170 on Growth of Human H157 Non-small
Cell Lung Carcinoma in Athymic Mice:
Comparison of Oral Dosing at Three Levels

Treatment	Parameter	Day 0	Day 4	Day 8	Day 12	Day 14	Day 17

Klucel	MTW	117	270	549	1066	1632	2314
Ex. 170	MTW	127	142	194	428	602	839
25 mg/kg	T/C	1.08	0.53	0.35	0.40	0.37	0.36
bid, po	p		0.002	0.001	0.003	0.001	0.001
Ex. 170	MTW	126	188	275	464	748	965
12.5 mg/kg	T/C	1.08	0.70	0.50	0.44	0.46	0.42
bid, po	p		0.018	0.005	0.004	0.004	0.002
Ex. 170	MTW	121	221	377	643	1030	1147
6.3 mg/kg	T/C	1.03	0.82	0.69	0.60	0.63	0.50
bid, po	p		0.130	0.044	0.023	0.024	0.003

TABLE 20


Evaluation of Example 170 on Growth of Human H157 Non-small Cell
Lung Carcinoma in Athymic Mice:
Comparison of Oral Dosing Once or Twice Per Day

Treatment	Parameter	Day 0	Day 4	Day 9	Day 12	Day 14	Day 18

Klucel	MTW	111	334	577	1037	2237	3782
Ex. 170	MTW	126	219	287	431	766	1550
25 mg/kg	T/C	1.14	0.65	0.50	0.42	0.34	0.41
qd, po	p		0.03	0.01	0.0006	0.0006	0.005
Ex. 170	MTW	115	123	158	176	413	817
25 mg/kg	T/C	1.04	0.37	0.27	0.17	0.18	0.22
bid, po	p		4E-05	5E-05	2E-06	9E-06	2.5E-05

TABLE 21


Evaluation of Example 170, Example 169, and Example 133 on
Growth of Human H157 Non-small Cell Lung Carcinoma in Athymic Mice:

Treatment	Parameter	Day 0	Day 5	Day 7	Day 10	Day 14	Day 17

Klucel	MTW	119	300	425	638	1385	1940
Ex. 170	MTW	136	215	253	345	540	1203
25 mg/kg	T/C	1.14	0.72	0.60	0.54	0.39	0.62
bid, ip	p		0.07	0.05	0.07	0.03	0.10
Ex. 169	MTW	136	277	425	716	1641	1869
25 mg/kg	T/C	1.14	0.92	1.00	1.12	1.18	0.96
bid, ip
Ex. 133	MTW	139	262	367	558	1103	1888
25 mg/kg	T/C	1.17	0.87	0.86	0.87	0.80	0.97
bid, ip

TABLE 22


Evaluation of Example 170 and Example 208 on Growth of Human H157
Non-small Cell Lung Carcinoma in Athymic Mice

Treatment	Parameter	Day 0	Day 3	Day 7	Day 10	Day 14	Day 17	Day 21

Klucel	MTW	138	213	580	1028	1948	3041	3453
Ex. 170	MTW	159	123	162	236	391	562	1335
50 mg/kg	T/C	1.15	0.58	0.28	0.23	0.20	0.18	0.39
bid, then	p		0.002	0.0005	0.001	0.001	0.0005	0.006
qd, ip
Ex. 208	MTW	158	187	287	367	See	See	See
50 mg/kg						note 5	note 5	note 5
bid, then
qd, ip

TABLE 23


Evaluation of Example 35 on Growth of Human H157
Non-small Cell Lung Carcinoma in Athymic Mice

Treatment	Parameter	Day 0	Day 6	Day 10	Day 14	Day 18	Day 21	Day 25

Klucel	MTW	87	255	334	721	1212	1148	2076
Ex.35	MTW	91	305	514	1372	2192	2296	2154
50 mg/kg	T/C	1.05	1.20	1.54	1.90	1.81	2.00	1.04
bid, ip	p

TABLE 24


Evaluation of Example 188 on Growth of Human H157
Non-small Cell Lung Carcinoma in Athymic Mice

Treatment	Parameter	Day 0	Day 4	Day 7	Day 10

Klucel	MTW	139	325	516	942
Ex. 188	MTW	154	385	560	1037
50 mg/kg	T/C	1.11	1.18	1.08	1.10
bid, ip	p		0.15	0.33	0.31

TABLE 25


Evaluation of Example 170 on Growth of Human U87MG
Glioblastoma in Athymic Mice: Comparison of
Intraperitoneal Dosing at Three Levels

Treatment	Parameter	Day 0	Day 4	Day 7	Day 10	Day 14	Day 17	Day 19

Klucel	MTW	160	258	406	504	1025	1656	2257
Ex. 170	MTW	156	134	145	111	144	200	296
25 mg/kg	T/C	0.98	0.52	0.36	0.22	0.14	0.12	0.13
bid, ip	p		2E-07	8.8E-07	1.5E-08	6.9E-09	3.3E-09	2.8E-06
Ex. 170	MTW	156	190	232	314	664	1155	1896
10 mg/kg	T/C	0.98	0.74	0.57	0.62	0.65	0.70	0.84
bid, ip	p		0.0010	0.0001	0.0005	0.0027	0.0084	0.174
Ex. 170	MTW	161	213	320	414	849	1631	2567
5 mg/kg	T/C	1.01	0.83	0.79	0.82	0.83	0.99	1.14
bid, ip	p		0.028	0.052	0.100	0.157	0.462	0.259

TABLE 26


Evaluation of Representative Compounds of this Invention on
Growth of Human U87MG Glioblastoma in Athymic Mice

Treatment	Parameter	Day 0	Day 3	Day 7	Day 9

Klucel	MTW	128	213	363	537
Ex. 170	MTW	128	138	120	112
25 mg/kg	T/C	1.00	0.65	0.33	0.21
bid, ip
Ex. 211	MTW	130	171	266	374
25 mg/kg	T/C	1.02	0.80	0.73	0.70
bid, ip
Ex. 198	MTW	127	198	305	559
25 mg/kg	T/C	0.99	0.93	0.84	1.04
bid, ip
Ex. 178	MTW	124	112	See	See
25 mg/kg	T/C	0.97	0.53	note 4	note 4
bid, ip
Ex. 175	MTW	138	176	239	433
25 mg/kg	T/C	1.08	0.83	0.66	0.81
bid, ip
Ex. 35	MTW	135	180	226	427
25 mg/kg	T/C	1.05	0.85	0.62	0.80
bid, ip
Ex. 169	MTW	136	187	254	464
25 mg/kg	T/C	1.06	0.88	0.70	0.86
bid, ip

TABLE 27


Evaluation of Example 170 on Growth of Human LOX Melanoma in
Athymic Mice: Comparison of Intraperitoneal and Oral Dosing

	Treatment	Parameter	Day 0	Day 7	Day 14

Klucel	RTG	1	11.51	40.53
Ex. 170	RTG	1	4.91	14.77
25 mg/kg	T/C	1	0.43	0.36
bid, ip	p		0.05	0.08
Ex. 170	RTG	1	8.06	35.55
10 mg/kg	T/C		0.70	0.88
bid, ip	p		0.38	0.53
Ex. 170	RTG	1	10.17	40.49
25 mg/kg	T/C		0.88	1.00
bid, po	p		0.61	0.53

TABLE 28


Evaluation of Example 170 on Growth of Human DLD1 Colon
Carcinoma in Athymic Mice: Comparison of Intraperitoneal and
Oral Dosing

Treatment	Parameter	Day 0	Day 7	Day 14	Day 21

Klucel	RTG	1	3.17	9.62	18.11
Ex. 170	RTG	1	3.60	8.08	14.58
25 mg/kg	T/C		1.14	0.84	0.81
bid, ip	p		0.87	0.20	0.31
Ex. 170	RTG	1	3.95	9.64	17.32
25 mg/kg	T/C		1.25	1.00	0.96
bid, po	p		0.96	0.56	0.48

Based on the results of these standard pharmacological test procedures, the compounds of this invention are useful as agents for treating, inhibiting or controlling the growth of cancerous tumor cells and associated diseases in a mammal in need thereof by interacting with tubulin and microtubules and promotion of microtubule polymerization. The compounds of the invention are also useful for the treatment or prevention of multiple drug resistant (MDR). The effective dosage of active ingredient employed may vary depending on the particular compound employed, the mode of administration and severity of the condition being treated. However, in general satisfactory results are obtained when the compounds of the invention are administered in amounts ranging from about 0.10 to about 100 mg/kg of body weight per day. A preferred regimen for optimum results would be from about 1 mg to about 20 mg/kg of body weight per day and such dosage units are employed that a total of from about 70 mg to about 1400 mg of the active compound for a subject of about 70 kg of body weight are administered in a 24 hour period.

The dosage regimen for treating mammals may be adjusted to provide the optimum therapeutic response. For example, several divided doses may be administered daily or the dose may be proportionally reduced as indicated by the exigencies of the therapeutic situation. A decidedly practical advantage is that these active compounds may be administered in any convenient manner such as by the oral, intravenous, intramuscular or subcutaneous routes. The active compounds may be orally administered, for example, with an inert diluent or with an assimilable edible carrier, or they may be enclosed in hard or soft shell gelatin capsules, or they may be compressed into tablets or they may be incorporated directly with the food of the diet. For oral therapeutic administration, these active compounds may be incorporated with excipients and used in the form of ingestible tablets, buccal tablets, troches, capsules, elixirs, suspensions, syrups, wafers and the like. Such compositions and preparations should contain at least 0.1% of active compound. The percentage of the compositions and preparations may, of course, be varied and may conveniently be between about 2% to about 60% of the weight of the unit. The amount of active compound in such therapeutically useful compositions is such that a suitable dosage will be obtained. Preferred compositions or preparations according to the present invention are prepared so that an oral dosage unit form contains between 10 and 1000 mg of active compound.

The tablets, troches, pills, capsules and the like may also contain the following: a binder such as gum tragacanth, acacia, corn starch or gelatin; excipients such as dicalcium phosphate; a disintegrating agent such as corn starch, potato starch, alginic acid and the like; a lubricant such as magnesium stearate; and a sweetening agent such as sucrose, lactose, or saccharin may be added or a flavoring agent such as peppermint, oil of wintergreen or cherry flavoring. When the dosage unit form is a capsule, it may contain, in addition to materials of the above type, a liquid carrier. Various other materials may be present as coatings or to otherwise modify the physical form of the dosage unit. For instance, tablets, pills or capsules may be coated with shellac, sugar or both. A syrup or elixir may contain the active compound, sucrose, as a sweetening agent, methyl and propylparabens as preservatives, a dye and flavoring such as cherry or orange flavor. Of course, any material used in preparing any dosage unit form should be pharmaceutically pure and substantially non-toxic in the amounts used. In addition, these active compounds may be incorporated into sustained-release preparations and formulations.

These active compounds may also be administered parenterally or intraperitoneally. Solutions or suspensions of these active compounds as a free base or pharmacologically acceptable salt can be prepared in water suitably mixed with a surfactant such as hydroxypropylcellulose. Dispersions can also be prepared in glycerol, liquid polyethylene glycols, and mixtures thereof in oils. Under ordinary conditions of storage and use, these preparations contain a preservative to prevent the growth or microorganisms.

The pharmaceutical forms suitable for injectable use include sterile aqueous solutions or dispersions and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersions. In all cases, the form must be sterile and must be fluid to the extent that easy syringability exists. It must be stable under the conditions of manufacture and storage and must be prepared against the contaminating action of microorganisms such as bacteria and fungi. The carrier can be a solvent or dispersion medium containing, for example, water, ethanol, polyol (e.g., glycerol, propylene glycol and liquid poly-ethylene glycol), suitable mixtures thereof, and vegetable oils.

The following examples are representative compounds of this invention which are useful as promoters of microtubule polymerization and as anticancer agents. [0455]

EXAMPLE 1

7-(1-azepanyl)-5-chloro-6-phenyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 2

5-chloro-6-(2,6-difluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 3

5-chloro-6-(4-methoxyphenyl)-7-(1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 4

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 5

7-(1-azepanyl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 6

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(2-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 7

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 8

methyl [[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl](methyl)amino]acetate

EXAMPLE 9

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(1,1,3,3-tetramethylbutyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 10

7-(1-azepanyl)-5-chloro-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 11

7-(1-azepanyl)-6-(4-bromophenyl)-5-chloro[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 12

5-chloro-7-(1-piperidinyl)-6-[2-(trifluoromethyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 13

6-(4-tert-butylphenyl)-5-chloro-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 14

5-chloro-6-(4-methoxyphenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 15

5-chloro-6-(4-methoxyphenyl)-7-(3-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 16

6-(4-bromophenyl)-5-chloro-7-(3-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 17

5-chloro-6-(3,4-difluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 18

5-chloro-6-(2,6-dichlorophenyl)-7-(2-methyl-1-pyrrolidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 19

5-chloro-6-(2-chlorophenyl)-7-(2-methyl-1-pyrrolidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 20

7-(1-azepanyl)-5-chloro-6-(3-chloro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 21

5-chloro-6-(3-chloro-4-methoxyphenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 22

5-chloro-6-(3-chloro-4-methoxyphenyl)-7-(2-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 23

6-(4-tert-butylphenyl)-5-chloro-7-(2-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 24

5-chloro-7-(2-methyl-1-piperidinyl)-6-[3-(trifluoromethyl)phenyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 25

Diethyl 2-[6-(2 6-difluorophenyl)-5-ethoxy[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]malonate

EXAMPLE 26

7-(azepanyl)-5-chloro-6-{2-chloro-6-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 27

5-chloro-6-(2-chloro-6-fluorophenyl)-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 28

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 29

5-chloro-6-(2-chloro-6-fluorophenyl)-N-[(2,2-dichlorocyclopropyl)methyl]-N-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 30

1-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-3-piperidinol

EXAMPLE 31

N-bicyclo[2,2,1]hept-2-yl-5-chloro-6-(3-chloro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 32

5-chloro-6-(2,5-difluorophenyl)-N-dodecyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 33

5-chloro-7-(4-methyl-1-piperidinyl)-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 34

N-[5-chloro-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-N-isopropylamine

EXAMPLE 35

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 36

N-allyl-5-chloro-6-(2-chloro-6-fluorophenyl)-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 37

5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 38

5-chloro-6-(3-chloro-4-methoxyphenyl)-N-cycloheptyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 39

5-chloro-6-(3-chloro-4-methoxyphenyl)-7-(3,3-dimethyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 40

5-chloro-N-(3-chloropropyl)-N-methyl-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 41

7-(1-azocanyl)-5-chloro-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 42

5-chloro-6-(2,6-difluorophenyl)-7-(3,6-dihydro-1(2H)-pyridinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 43

7-(1-azocanyl)-5-chloro-6-(2,6-difluorophenyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 44

5-methoxy-6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 45

[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]methanol

EXAMPLE 46

1-[5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-4-piperidinol

EXAMPLE 47

5-chloro-7-(4-chloro-1-piperidinyl)-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 48

5-chloro-7-(4-thiomorpholinyl)-6-(2,3,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 49

5-chloro-6-(2,6-difluorophenyl)-7-(2,4-dimethyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 50

7-(4-methyl-1-piperidinyl)-5-amino-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 51

5-chloro-6-(2,6-difluorophenyl)-7-(2,5-dihydro-1H-pyrrol-1-yl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 52

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(2,5-dimethyl-2,5-dihydro-1H-pyrrol-1-yl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 53

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(2-ethyl-1H-imidazol-1-yl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 54

7-(4-bromo-1-piperidinyl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 55

5-chloro-6-(2-methylphenyl)-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 56

6-(2-bromophenyl)-N-(sec-butyl)-5-chloro[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 57

5-chloro-N-ethyl-6-(4-methoxyphenyl)-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 58

5-chloro-6-(4-methoxyphenyl)-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 59

5-chloro-7-(4-chloro-1-piperidinyl)-6-[2-(trifluoromethyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 60

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(trifluoromethyl)-1-piperidinyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 61

7-(4-bromo-1-piperidinyl)-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 62

7-(4-bromo-1-piperidinyl)-5-chloro-6-(2-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 63

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 64

5-chloro-N-isopropyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 65

5-chloro-7-(4-thiomorpholinyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 66

7-(1-azepanyl)-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 67

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[2-(1-pyrrolidinyl)-1-cyclopenten-1-yl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 68

5-chloro-7-(4-isopropyl-1-piperidinyl)-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 69

5-chloro-7-(2,4-dimethyl-1-piperidinyl)-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 70

5-chloro-7-[ethyl(2-methyl-2-propenyl)amino]-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 71

7-(1-azepanyl)-5-chloro-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 72

N-bicyclo[2.2.1]hept-2-yl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 73

5-chloro-6-(2,6-difluorophenyl)-N-(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 74

5-chloro-6-(2-chlorophenyl)-N-(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 75

5-chloro-6-(2-chloro-6-fluorobenzyl)-7-tetrahydro-2-furanyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 76

7-(allylsulfanyl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 77

5-chloro-N-ethyl-6-mesityl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 78

5-chloro-N-ethyl-6-(2-methoxyphenyl)-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 79

5-chloro-6-(2-chloro-6-fluorophenyl)-N-hexyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 80

5-chloro-7-(4-methyl-1-piperidinyl)-6-[4-(methylsulfanyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 81

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-[4-(methylsulfanyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 82

N-(sec-butyl)-5-chloro-6-[4-(methylsulfanyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 83

5-chloro-6-[4-(methylsulfanyl)phenyl]-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 84

5-chloro-6-[2,6-dichloro-4-(trifluoromethylphenyl]-7-(4-methyl-1-piperidinyl)[1 2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 85

7-(1-azepanyl)-5-chloro-6-[2,6-dichloro-4-(trifluoromethyl)phenyl][1 2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 86

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[(2,2,2-trifluoroethyl)sulfanyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 87

5-chloro-6-(2-chloro-6-fluorophenyl )-7-(4,4-dimethyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 88

5-chloro-6-[2,6-dichloro-4-(trifluoromethyl)phenyl]-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 89

5-chloro-6-[2,6-dichloro-4-(trifluoromethyl)phenyl]-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 90

5-chloro-6-(3,5-difluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 91

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(isopropylsulfanyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 92

5-chloro-6-(2-chloro-6-fluorophenyl)-7-tetrahydro-2-furanyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 93

4-[5-chloro-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]aniline

EXAMPLE 94

N-{4-[5-chloro-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]phenyl}acetamide

EXAMPLE 95

[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]methyl acetate

EXAMPLE 96

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(chloromethyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 97

diethyl 2-[6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidin-5-yl]malonate

EXAMPLE 98

7-(1-azepanylmethyl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 99

N-allyl-5-chloro-6-(2-chloro-6-fluorophenyl)-N-hexyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 100

5-chloro-7-(4-methyl-1-piperidinyl)-6-[4-(trifluoromethoxy)phenyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 101

5-chloro-7-(4-methyl-1-piperidinyl)-6-(4-phenoxyphenyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 102

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(cyclopropylmethyl)-N-propyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 103

5-chloro-7-(2-methyl-1-piperidinyl)-6-(4-phenoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 104

5-chloro-6-{2-chloro-4-nitrophenyl}-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 105

5-chloro-6-(4-chloro-2,3,5,6-tetrafluorophenyl)-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 106

4-[5-chloro-2-methyl-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]-N,N-dimethylaniline

EXAMPLE 107

6-(2-chloro-6-fluorophenyl)-5-methyl-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 108

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[2-(1-pyrrolidinyl)-1-cyclohexen-1-yl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 109

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(methoxymethyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 110

5-chloro-6-{2-chloro-4-nitrophenyl}-7-[ethyl(2-methyl-2-propenyl)amino][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 111

5-bromo-6-(2-chloro-6-fluorophenyl)-7-(isopropylsulfanyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 112

5-chloro-N-cyclopentyl-6-(4-ethoxy-2,3,5,6-tetrafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 113

5-chloro-N-methyl-N-(2-methyl-2-propenyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 114

4-bromo-1-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]butyl acetate

EXAMPLE 115

diethyl 2-allyl-2-{[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]oxy}malonate

EXAMPLE 116

6-(2-chloro-6-fluorophenyl)-N-ethyl-5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 117

N-butyl-5-chloro-N-ethyl-6-(2,3,4,5,6-pentafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 118

6-(2-chloro-6-fluorophenyl)-5-(difluoromethoxy)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 119

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[(4-chlorophenyl)sulfanyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 120

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[(2-methoxyphenyl)sulfanyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 121

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 122

5-chloro-6-(2,3,4,5,6-pentafluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 123

5-chloro-6-(2,4,6-trifluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 124

5-chloro-6-(4-fluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 125

5,7-bis(4-methyl-1-piperidinyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 126

5-chloro-6-(2-methylphenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 127

5-chloro-6-(2,4,5-trifluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 128

6-(2-bromophenyl)-5-chloro-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 129

5-chloro-N-isobutyl-N-(2,2,2-trifluoroethyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 130

5-chloro-N-isobutyl-6-(2-methylphenyl)-N-(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 131

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 132

5-chloro-6-(2,6-difluorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 133

5-chloro-N-(2,2,2-trifluoro-1-methylethyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 134

N-allyl-5-chloro-N-isobutyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 135

5-chloro-N-(1,2-dimethylpropyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 136

5-chloro-N-isopropyl-N-methyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 137

5-chloro-N-isopropyl-N-(2,2,2-trifluoroethyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 138

7-butyl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 139

5-chloro-N-(1-phenylethyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 140

5-chloro-6-(2-chlorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 141

5-chloro-N-ethyl-N-isobutyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 142

5-chloro-6-(2-chloro-6-fluorophenyl)-7-hexyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 143

5-chloro-6-(2-methylphenyl)-N,N-bis(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 144

5-chloro-N-cyclopentyl-N-methyl-6-(2,3,4,5,6-pentafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 145

7-butyl-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 146

5-chloro-N-(1,2-dimethylpropyl)-N-methyl-6-(2,3,4,5,6-pentafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 147

5-chloro-6-(2-chloro-6-fluorophenyl)-7-phenyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 148

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(2-methylpropanyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 149

5-chloro-6-(2-chloro-6-fluorophenyl)-7-pentyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 150

5-chloro-N-(1,2-dimethylpropyl)-N-methyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 151

5-chloro-6-(2-chloro-6-fluorophenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 152

5-chloro-6-(2-bromo-5-chlorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 153

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(3,3,3-trifluoropropyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 154

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(3-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 155

[5-chloro-6-(2,4,6-trifluorophenyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-(1-p-tolyl-ethyl)-amine

EXAMPLE 156

5-chloro-6-(2,4,6-trifluoro-phenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 157

5-chloro-7-cyclohexyl-6-(2,3,4,5,6-pentafluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 158

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(4,4-difluoro-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 159

7-(bicyclo[2.2.1]hept-2-ylamino)-5-chloro-6-{2-fluoro-4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 160

5-chloro-6-{2-fluoro-4-nitrophenyl}-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 161

5-(methylsulfanyl)-6-(2-chloro-6-fluorophenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 162

[5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl](2,2,2-trifluoro-1-phenylethyl)-amine

EXAMPLE 163

5-chloro-N-[1-(trifluoromethyl)propyl]-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 164

5-bromo-6-(2-chloro-6-fluorophenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 165

6-(2-chloro-6-fluorophenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidin-5-amine

EXAMPLE 166

[5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-(2-methyl-1-trifluoromethyl-propyl)amine

EXAMPLE 167

5-chloro-7-(3-cyclohexen-1-yl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 168

5-chloro-7-(1-cyclohexen-1-yl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 169

5-chloro-N-[(1R)-2,2,2-trifluoro-1-methylethyl]-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 170

EXAMPLE 171

6-(2,4-difluorophenyl)-5-chloro-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 172

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 173

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 174

5-chloro-7-cyclohexyl-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 175

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-[(1S)-2,2,2-trifluoro-1-methylethyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 176

7-cyclohexyl-6-(2,6-difluoro-4-methoxyphenyl)-5-methoxy[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 177

5-chloro-7-(4-fluorocyclohexyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 178

5-chloro-6-(2,6-dichloro-4-fluorophenyl)-7-(3,3,3-trifluoropropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 179

N-(sec-butyl)-5-chloro-6-(2,6-dichloro-4-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 180

4-{5-chloro-7-[(2,2,2-trifluoro-1-methylethyl)amino][1,2,4]triazolo[1,5-a]pyrimidin-6-yl}-3,6-difluorophenol

EXAMPLE 181

5-chloro-7-(3-cyclohexen-1-yl)-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 182

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 183

5-chloro-N-cyclopentyl-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 184

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(3,6-dihydro-1(2H)-pyridinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 185

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(4-thiomorpholinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 186

7-(1-azepanyl)-5-chloro-6-(2,6-difluoro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 187

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 188

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 189

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(4-fluorocyclohexyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 190

6-(4-{5-chloro-7-[(2,2,2-trifluoro-1-methylethyl)amino][1,2,4]triazolo[1,5-a]pyrimidin-6-yl}-3,5-difluorophenoxy)hexanoic acid

EXAMPLE 191

2,6-difluoro-4-(2-fluoroethoxy)phenyl]-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 192

5-chloro-N-isopropyl-6-{2-[(trifluoromethyl)sulfanyl]phenyl}[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 193

5-chloro-N-[4-(trifluoromethyl)phenyl]-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 194

5-chloro-N-(4,4,4-trifluoro-2-methylbutyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 195

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(3-methyl-3-butenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 196

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-isobutyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 197

7-cyclopentyl-6-(2,6-difluoro-4-methoxyphenyl)-5-methoxy[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 198

5-chloro-6-(2-thienyl)-N-[(1R)-2,2,2-trifluoro-1-methylethyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 199

4-(5-chloro-7-(2,2,2-trifluoro-1-methyl-ethylamino)[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]-3,5-difluoro-phenol

EXAMPLE 200

{5-chloro-6-[2,6-difluoro-4-(2,2,2-trifluoro-ethoxy)-phenyl]-[1,2,4triazolo[1,5-a]pyrimidin-7-yl}-(2,2,2-trifluoro-1-methyl-ethyl)amine

EXAMPLE 201

5-chloro-6-{2,6-difluoro-4-(methoxyphenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 202

(5-chloro-6-{4-[2-(2-ethoxyethoxy]-ethoxy]-2,6-difluoro-phenyl}[1,2,4]triazolo[1,5-a]pyrimidin-7-yl-)-(2,2,2-trifluoro-1-methylethyl)amine

EXAMPLE 203

(5-chloro-6-{2,6-difluoro4-[2-(2-methoxy-ethoxy)ethoxy]-phenyl}-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl-)-(2,2,2-trifluoro-1-methylethyl)amine

EXAMPLE 204

5-chloro-6-[2,6-difluoro-4-(3-furan-3-ylmethoxy)phenyl[1,2,4]triazolo[1,5-a]pyrimidin-7-yl}-N-(2,2,2-trifluoro-1-methylethyl)amine

EXAMPLE 205

5-chloro-6-(2,5-difluoro-4-methoxyphenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 206

7-cyclohexyl-6-[2,6-difluoro-4-(2-methoxyethoxy)phenyl]-5-methoxy[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 207

5-chloro-6-(2-fluoro-4-methoxy-6-chlorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 208

5-chloro-6-[2,6-difluoro-4-(2-fluoroethoxy)phenyl]-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 209

2-[2-(4-{5-chloro-7-[(2,2,2-trifluoro-1-methylethyl)amino][1,2,4]triazolo[1,5-a]pyrimidin-6-yl}-3,5-difluorophenoxy)ethoxy]ethanol

EXAMPLE 210

5-chloro-6-(2,3-difluoro-4-methoxyphenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 211

5-chloro-6-{4-(2-fluoroethoxy)-2,6-difluorphenyl}-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 212

5-chloro-N-(4-chlorobenzyl)-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 213

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(2-pyridinyl)-1-piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 214

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(1-ethylpentyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 215

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(2-chlorophenyl)-1-piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 216

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(4-methoxyphenyl)-3-methyl-1-piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 217

5-chloro-N-cyclopentyl-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 218

5-chloro-7-phenoxy-6-(4-methoxy-phenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 219

5-chloro-N-cyclopentVl-6-(4-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 220

5,7-diphenoxy-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 221

5-chloro-N-cyclopentyl-6-(2-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 222

5-chloro-N,N-diethyl-6-[4-methoxyphenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 223

5-chloro-N,N-diethyl-6-[2,4-dichlorophenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 224

N-bicylo[2.2.1]hept-2-yl-5-chloro-6-(2,4-dichlorophenyl)[1,2,4]triazo[1,5-a]pyrimidin-7-amine

EXAMPLE 225

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 226

5-cyano-7-(4-methyl-1-piperidinyl)-6-(2-chloro-5-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 227

5-(methylsulfanyl)-7-(4-methyl-1-piperidinyl)-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 228

5-(methylsulfanyl)-7-(4-methyl-1-piperidinyl)-6-(2-chloro-5-(methylsulfanyl)phenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 229

5-chloro-7-(1,4-dioxa-8-azaspiro[4,5]dec-8-yl)-6-(4-methoxyphenyl)[2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 230

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-(4-(methylsulfanyl)phenyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 231

2-methyl-6,7-di-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 232

2-methyl-6-phenyl-7-(4-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 233

2-trifluoromethyl-6-phenyl-7-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 234

5,7-diphenoxy-6-(2-methylpropyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 235

5-chloro-6-(3,4-difluorophenyl)-N-(isopropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 236

5-bromo-6-(4-bromophenyl)-7-dimethylamino]1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 237

5-bromo-6-(4-trifluoromethylphenyl)-7-dimethylamino[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 238

5-chloro-6-(3,4-difluorophenyl)-7-dimethylamino[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 239

5-chloro-6-(4-trifluoromethylphenyl)-N-(ethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 240

7-(1-azepanyl)-5-chloro-6-(4-tert-butylphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 241

ethyl {[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]amino}acetate

EXAMPLE 242

diethyl 5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-malonate

EXAMPLE 243

5-chloro-6-(2,5-difluorophenyl)-N-(3-methyl-2-butenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 244

[5-chloro-6-(2-chloro-6-fluorophenyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]acetic acid methyl ester

EXAMPLE 245

5-chloro-6-(2,6-difluorophenyl)-7-(2-ethyl-1H-imidazol-1-yl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 246

5-chloro-N,N-diethyl-6-[4-(methylsulfanyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 247

ethyl [6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1-piperidinyl)-[1,2,4]triazolo[1,5-a]pyrimidin-5-yl]acetate

EXAMPLE 248

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-(4-phenoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 249

dimethyl 2-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]malonate

EXAMPLE 250

diethyl 2-{[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]oxy}-2-isobutylmalonate

EXAMPLE 251

2-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4triazolo[1,5-a]pyrimidin-7-yl]-1,3-cyclohexanedione

EXAMPLE 252

2-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]cyclohexanone

EXAMPLE 253

5-chloro-7-(3-nitro-4-methylanilino)-6-(2,4,6-trifluorophenyl) [1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 254

7-cyclohexyl-6-[2,6-difluoro-4-(2-methoxyethoxy)phenyl]5-(2-methoxyethoxy)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 255

7-(3-bromophenyl)-2-ethyl-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 256

7-(3-bromophenyl)-6-(3-chlorophenyl)-2-ethyl[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 257

7-(4-bromophenyl)-2-ethyl-6-[4-(trifluoromethyl)phenyl]1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 258

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(3,4,5-trimethoxybenzyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 259

7-(2-benzyl-4,5-dihydro-1H-imidazol-1-yl)-5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 260

N-4-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl-N,N-1-diethyl-1,4-pentanediamine

EXAMPLE 261

5-chloro-N-(3-methyl-2-butenyl)-6-phenyl[1,2,4]trazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 262

5-dimethylamino-6-phenyl-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 263

5-chloro-7-[(2-furylmethyl)sulfanyl]-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 264

6-[1,1′-biphenyl]-4-yl-5-chloro-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 265

6-[4-(benzyloxy)phenyl]-5-chloro-N-isopropyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 266

5-chloro-N-[(2,2-dichlorocyclopropyl)methyl]-6-(3,4,5-trimethoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 267

N-cyclopentyl-6-(2-fluorophenyl)-5-hydrazino[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 268

5-chloro-N-ethyl-6-(2-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 269

6-(4-tert-butylphenyl)-5-chloro-N-isopropyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 270

5-chloro-6-[2,6-difluoro-4-[(3-methyl-2-butenyl)oxy]phenyl]-N-(2,2,2-trifluoro-1-methylethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 271

5-chloro-6-[2,6-difluoro-4-(1-propenyloxy)phenyl]-N-(2,2,2-trifluoro-1-methylethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

EXAMPLE 272

5-chloro-N-(3-tricyclo[2.2.1.0^2,6]hept-1-yl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]primidin-7-amine

EXAMPLE 273

5-azido-7-cyclohexyl-6-(2-fluoro-6-chlorophenyl)[1,2, ]triazolo[1,5-a]pyrimidine

EXAMPLE 274

5-azido-6-[2-chloro-6-fluorophenyl]-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine

EXAMPLE 275

2,5-dichloro-7-(4-methyl-1-piperidinyl)-6-[2-chloro-6-fluorophenyl][1,2,4]triazolo[1,5-a]pyrimidine

Claims

We claim:

1. A method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof which comprises administering to said mammal an effective amount of a substituted triazolopyrimidine derivative or a pharmaceutically acceptable salt thereof.

2. The method according to claim 1 wherein the substituted triazolopyrimidine derivative is a compound selected from those of the formula:

wherein:

R¹is selected from the group consisting of halogen, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, —CN, hydroxy, halogen, carbamoyl, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, heterocyclyl, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, thiophene, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-cycloalkyl of 3 to 8 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^b;

R^ais H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms,optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted tricycloalkyl, haloalkyl of 1 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl, cycloalkyl of 3 to 8 carbon atoms or a 3- to 6-membered heterocyclyl ring, optionally ortho-fused with an optionally substituted phenyl ring;

R^bis H, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl, —S-alkenyl, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl, —SO₂alkyl, —O-aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl, cycloalkyl of 3 to 8 carbon atoms or a 3- to 6-membered heterocyclyl ring, optionally ortho-fused with an optionally substituted phenyl ring;

R^aR^btogether with the nitrogen atom to which each is attached represent an optionally substituted saturated or unsaturated heterocyclyl ring from 3 to 12 ring atoms in which optionally, at least one —CH₂— may optionally be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, said saturated or unsaturated heterocyclyl ring may optionally be aryl or cycloalkyl fused;

R²is H, optionally substituted alkyl of 1 to 12 carbon atoms, amino, hydroxy, alkylthio of 1 to 12 carbon atoms, cyano, carbamoyl, optionally substituted alkoxy of 1 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, aryloxy, benzyloxy, thienyl, heterocyclyl or halogen;

R³is H, halogen, alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, aryloxy, —NR^cR^d, benzyloxy, aralkyloxy, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, heterocyclyl, aryl, hydroxy, carbamoyl, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃;

R^cis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl , optionally substituted benzyl, or heterocyclyl;

R^dis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, or heterocyclyl;

R^cR^dtogether with the nitrogen atom to which each is attached represent an optionally substituted heterocyclyl ring from 3 to 8 ring atoms optionally substituted in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or alkyl of 1 to 12 carbon atoms;

R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, halogen, cyano, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, heterocyclyl, halogen, carbamoyl, optionally substituted aryl of 6, 10 or 14 carbon atoms, or —CF₃;

provided that when:

a) R¹is diethylamino, R³is chloro, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl, 3,4-dichlorophenyl, 4-chlorophenyl, 3-chloro-4-methoxyphenyl;

b) R¹is diethylamino, R³is bromo, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl;

c) R¹is isopropylamino, R³is chloro, R⁴is hydrogen, R²is not 2-benzyloxyphenyl or 3,4,5-trimethoxyphenyl;

d) R¹is cyclopentylamino, R³is chloro, R⁴is hydrogen, R²is not 3,4,5-trimethoxyphenyl, 2-napthyl or 2-stilbene;

e) R¹is 2-amino-bicyclo(2.2.1.)heptyl, R³is chloro, R⁴is hydrogen, R²is not 3,4,5-trimethoxyphenyl and

f) R¹is diethylamino, R³is chloro, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl and

g) R¹is 1,1,1-trifluoroethoxy, R³is chloro, R⁴is hydrogen, R²is not 2-chloro-6-fluorophenyl

h) R¹is —SO₂ethyl or —SO₂cyclopentyl, R³is chloro, R⁴is hydrogen, R²is not 2-chloro-6-fluorophenyl;

i) R⁴is hydrogen, R²is 2-chloro-6-fluorophenyl, R¹and R³are not 1,2,4-triazole;

j) R¹is cyclohexyl, R⁴is hydrogen, R²is 2,4,6-trifluorophenyl, and R³is not —OCH₂O₂C(CH₃)₃;

k) R¹is 2-thienyl, R⁴is ethyl, R³is hydrogen and R²is not 2-methoxyphenyl, 4-methoxyphenyl, and 4-trifluorophenyl;

I) R²is phenyl, R³is chloro, R⁴is hydrogen R¹is not (2E)-3,7-dimethyl-2,6-octadienyl

or a pharmaceutically acceptable salt thereof.

3. The method according to claim 2 wherein

R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^bor a pharmaceutically acceptable salt thereof is administered.

4. The method according to claim 2 wherein R^aand R^beach independently represent the moiety —C*H(R^e)(R^f) where R^eand R^findependently represent an optionally halo-substituted alkyl group of 1 to 12 carbon atoms where C* represents the (R) or (S) isomer or a pharmaceutically acceptable salt thereof is administered.

5. The method according to claim 2 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms, aryloxy, thienyl, benzyloxy, heterocyclyl or halogen or a pharmaceutically acceptable salt thereof is administered.

6. The method according to claim 2 wherein R³is halogen, alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, aryloxy, —NR^cR^d, benzyloxy, aralkyloxy, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, hydroxy, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃or a pharmaceutically acceptable salt thereof is administered.

7. The method according to claim 2 wherein R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃or a pharmaceutically acceptable salt thereof is administered.

8. The method according to claim 2 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached or a pharmaceutically acceptable salt thereof is administered.

9. The method according to claim 2 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms or heterocyclyl or a pharmaceutically acceptable salt thereof is administered.

10. The method according to claim 2 wherein R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃or a pharmaceutically acceptable salt thereof is administered.

11. The method according to claim 2 wherein R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃or a pharmaceutically acceptable salt thereof is administered.

12. The method according to claim 2 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 5 to 10 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached or a pharmaceutically acceptable salt thereof is administered.

13. The method according to claim 2 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms or a pharmaceutically acceptable salt thereof is administered.

14. The method according to claim 2 wherein R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃or a pharmaceutically acceptable salt thereof is administered.

15. The method according to claim 2 wherein R⁴is H or a pharmaceutically acceptable salt thereof is administered.

16. The method according to claim 2 wherein R¹is selected from the group consisting of an optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is optionally substituted phenyl;

R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

17. The method according to claim 2 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is optionally substituted phenyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

18. The method according to claim 2 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is optionally substituted phenyl;

R³is halogen, alkoxy, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃;

R⁴is H;

R^ais H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl;

R^bis H, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms;

R^aR^btogether with the nitrogen atom to which each is attached represent an optionally substituted saturated or unsaturated heterocyclyl ring from 3 to 12 ring atoms in which optionally, at least one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 2 to 12 carbon atoms, said saturated or unsaturated heterocyclyl ring may optionally be aryl or cycloalkyl fused;

R^cis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl , optionally substituted benzyl, or heterocyclyl;

R^dis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, heterocyclyl;

R^cR^dtogether with the nitrogen atom to which each is attached represent an optionally substituted heterocyclyl ring from 3 to 8 ring atoms optionally substituted in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or alkyl of 2 to 20 carbon atoms or a pharmaceutically acceptable salt thereof is administered.

19. The method according to claim 2 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is selected from

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

20. The method according to claim 2 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R²is optionally substituted phenyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

21. The method according to claim 2 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R²is optionally substituted thienyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

22. The method according to claim 2 wherein said compound selected from:

7-(1-azepanyl)-5-chloro-6-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(4-methoxyphenyl)-7-(1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-( 1,1,3,3-tetramethylbutyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-(1-azepanyl)-5-chloro-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-6-(4-bromophenyl)-5-chloro[1,2,4]triazolo[1,5-a]pyrimidine; 5-chloro-7-(1-piperidinyl)-6-[2-(trifluoromethyl)phenyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(3-chloro-4-methoxyphenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(3-chloro-4-methoxyphenyl)-7-(2-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

N-bicyclo[2.2.1]hept-2-yl-5-chloro-6-(3-chloro-4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(3-chloro-4-methoxyphenyl)-7-(3,3-dimethyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,6-difluorophenyl)-7-(3,6-dihydro-1(2H )-pyridinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azocanyl)-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-methoxy-6-(2-chloro-6-fluorophenyl)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]methanol;

5-chloro-6-(2,6-difluorophenyl)-7-(2,4-dimethyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(4-bromo-1-piperidinyl)-5-chloro-6-(2-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-[ethyl (2-methyl-2-propenyl )amino]-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

N-bicyclo[2.2.1]hept-2-yl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chlorophenyl)-N-(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorobenzyl)-7-tetrahydro-2-furanyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-[2,6-dichloro-4-(trifluoromethyl)phenyl]-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-{2-chloro-4-nitrophenyl}-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

6-(2-chloro-6-fluorophenyl)-5-methyl-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[2-(1-pyrrolidinyl)-1-cyclohexen-1-yl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(methoxymethyl)[1,2,4]triazolo[1,5-a]pyrimidine;

4-bromo-1-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]butyl acetate;

6-(2-chloro-6-fluorophenyl)-5-(difluoromethoxy)-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,4,6-trifluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-(2-bromophenyl)-5-chloro-N-( 1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-(1,2-dimethylpropyl)-6-(2,4 ,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-isopropyl-N-methyl-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-butyl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-hexyl[[ , 2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-methylphenyl)-N, N-bis(2,2,2-trifluoroethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-butyl-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-pentyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-bromo-5-chlorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,4,6-trifluoro-phenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(4,4-difluoro-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(bicyclo[2.2.1]hept-2-ylamino)-5-chloro-6-{2-fluoro-4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-{2-fluoro-4-nitrophenyl}-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

[5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl](2,2,2-trifluoro-1-phenylethyl)-amine;

5-bromo-6-( 2-chloro-6-fluorophenyl)-7-cyclohexyl[1,2,4]triazolo[1,5-a]pyrimidine;

6-(2,4-difluorophenyl)-5-chloro-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-[(1S)-2,2,2-trifluoro-1-methylethyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-7-(4-fluorocyclohexyl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2,6-difluoro-4-(2-fluoroethoxy)phenyl]-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl )-7-(3-methyl-3-butenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-{2,6-difluoro-4-(methoxyphenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

(5-chloro-6-{4-[2-(2-ethoxyethoxy]-ethoxy]-2,6-difluoro-phenyl}[1,2,4]triazolo[1,5-a]pyrimidin-7-yl-)-(2,2,2-trifluoro-1-methylethyl)amine;

5-chloro-6-(2-fluoro-4-methoxy-6-chlorophenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-difluoro-4-(2-fluoroethoxy)phenyl]-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

2-[2-(4-{5-chloro-7-[(2,2,2-trifluoro-1-methylethyl)amino][1,2,4]triazolo[1,5-a]pyrimidin-6-yl}-3,5-difluorophenoxy)ethoxy]ethanol;

5-chloro-6-(2,3-difluoro-4-methoxyphenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(2-pyridinyl)-1-piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl )-7-[4-(2-chlorophenyl)-1-piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(4-methoxyphenyl)-3-methyl-1-piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-phenoxy-6-(4-methoxy-phenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5,7-diphenoxy-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl )-7-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-(1,4-dioxa-8-azaspiro[4,5]dec-8-yl)-6-(4-methoxyphenyl )[1,2,4]triazolo[1,5-a]pyrimidine;

2-methyl-6,7-di-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-methyl-6-phenyl-7-(4-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-trifluoromethyl-6-phenyl-7-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5,7-diphenoxy-6-(2-methylpropyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-bromo-6-(4-bromophenyl)-7-dimethylamino[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(4-tert-butylphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

[5-chloro-6-(2-chloro-6-fluorophenyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]acetic acid methyl ester;

5-chloro-6-(2,6-difluorophenyl)-7-(2-ethyl-1H-imidazol-1-yl)[1,2,4]triazolo[1,5-a]pyrimidine;

dimethyl 2-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]malonate;

5-chloro-7-(3-nitro-4-methylanilino)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(3-bromophenyl)-2-ethyl-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(3-bromophenyl)-6-(3-chlorophenyl)-2-ethyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-dimethylamino-6-phenyl-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

N-cyclopentyl-6-(2-fluorophenyl)-5-hydrazino[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-ethyl-6-(2-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-(4-tert-butylphenyl)-5-chloro-N-isopropyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-difluoro-4-[(3-methyl-2-butenyl)oxy]phenyl]-N-(2,2,2-trifluoro-1-methylethyl)-I[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-difluoro-4-(1-propenyloxy)phenyl]-N-(2,2,2-trifluoro-1-methylethyl)-l[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-(3-tricyclo[2.2.1.0^2.6]hept-1-yl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-azido-6-[2-chloro-6-fluorophenyl]-7-(4-methyl-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2,5-dichloro-7-(4-methyl-1-piperidinyl)-6-[2-chloro-6-fluorophenyl][1,2,4]triazolo[1,5-a]pyrimidine or a pharmaceutically acceptable salt thereof is administered.

23. A method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof by interacting with tubulin and microtubules and promoting microtubule polymerization which comprises administering to said mammal an effective amount of a substituted triazolopyrimidine derivative or a pharmaceutically acceptable salt thereof.

24. The method according to claim 23 wherein the substituted triazolopyrimidine derivative is a compound selected from those of the formula:

wherein:

provided that when:

e) R¹is 2-aminobicyclo(2.2.1.)heptyl, R³is chloro, R⁴is hydrogen, R²is not 3,4,5-trimethoxyphenyl and

l) R²is phenyl, R³is chloro, R⁴is hydrogen R¹is not (2E)-3,7-dimethyl-2,6-octadienyl

or a pharmaceutically acceptable salt thereof.

25. The method according to claim 24 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^bor a pharmaceutically acceptable salt thereof is administered.

26. The method according to claim 24 wherein R^aand R^beach independently represent the moiety —C*H(R^e)(R^f) where R^eand R^findependently represent an optionally halo-substituted alkyl group of 1 to 12 carbon atoms where C* represents the (R) or (S) isomer or a pharmaceutically acceptable salt thereof is administered.

27. The method according to claim 24 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms, aryloxy, thienyl, benzyloxy, heterocyclyl or halogen or a pharmaceutically acceptable salt thereof is administered.

28. The method according to claim 24 wherein R³is halogen, alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, aryloxy, —NR^cR^d, benzyloxy, aralkyloxy, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, hydroxy, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃or a pharmaceutically acceptable salt thereof is administered.

29. The method according to claim 24 wherein R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃or a pharmaceutically acceptable salt thereof is administered.

30. The method according to claim 24 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached or a pharmaceutically acceptable salt thereof is administered.

31. The method according to claim 24 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms or heterocyclyl or a pharmaceutically acceptable salt thereof is administered.

32. The method according to claim 24 wherein R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃or a pharmaceutically acceptable salt thereof is administered.

33. The method according to claim 24 wherein R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃or a pharmaceutically acceptable salt thereof is administered.

34. The method according to claim 24 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 5 to 10 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached or a pharmaceutically acceptable salt thereof is administered.

35. The method according to claim 24 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms or a pharmaceutically acceptable salt thereof is administered.

36. The method according to claim 24 wherein R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃or a pharmaceutically acceptable salt thereof is administered.

37. The method according to claim 24 wherein R⁴is H or a pharmaceutically acceptable salt thereof is administered.

38. The method according to claim 24 wherein R¹is selected from the group consisting of an optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is optionally substituted phenyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

39. The method according to claim 24 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached; R²is optionally substituted phenyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

40. The method according to claim 24 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is optionally substituted phenyl;

R⁴is H;

R^bis H, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms;

R^cis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, heterocyclyl;

R^dis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl , optionally substituted benzyl, or heterocyclyl;

41. The method according to claim 24 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is halogen, alkoxy, —NR^cR^d, haloalkoxy of 1 t 12 carbon atoms, alkylthio of 1 to 12 carbon adtoms, cyano, or —N₃;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

42. The method according to claim 24 wherein R¹is the moity —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R²is optionally substituted phenyl;

R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12

carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

43. The method according to claim 24 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R²is optionally substituted thienyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

44. The method according to claim 24 wherein said compound selected from:

7-(1-azepanyl)-5-chloro-6-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(4-methoxyphenyl)-7-(1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-6-(4-bromophenyl)-5-chloro[1,2,4]triazolo[1,5-a]pyrimidine;

6-(4-tert-butylphenyl)-5-chloro-7-(4-methyl-1-piperidinyl )[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(3-chloro4-methoxyphenyl)-N-cycloheptyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-(1-azocanyl)-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(trifluoromethyl)1-piperidinyl][1,2,4]triazolo[1,5a]pyrimidine;

5-chloro-7-[ethyl(2-methyl-2-propenyl)amino]-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

N-bicyclo[2.2.1 ]hept-2-yl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2chloro-6-fluorobenzyl)-7-tetrahydro-2-furanyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[2-( 1-pyrrolidinyl)-1-cyclohexen-1-yl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,4,6-trifluorophenyl)-N-(1,2,2-trimethylpropyl)[1,2,4]triazolo[-1,5-a]pyrimidin-7-amine;

5,7-bis(4-methyl-1-piperidinyl )-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2,4,5-trifluorophenyl)-N-(1,2,2-trimethyl propyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-butyl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-hexyl[1,2,4]triazolo[1,5-a]pyrimidine;

7-butyl-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-pentyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-[(1R)-2,2,2-trifluoro1-methylethyl]-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-cyclohexyl-6-(2,6-difluoro4-methoxyphenyl)-5-methoxy[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-[2,6-difluoro4-(2-fluoroethoxy)phenyl]-N-ethyl-N-(2-methyl-2-propenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-[4-(2-chlorophenyl)-1-piperazinyl][1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-7-phenoxy-6-(4-methoxy-phenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5,7-diphenoxy-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N,N-diethyl-6-[4-methoxyphenyl][1,2,4]triazolo[1,5-a] pyrimidin-7-amine;

N-bicyclo[2.2.1 ]hept-2-yl-5-chloro-6-(2,4-dichlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

2-methyl-6,7-di-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-methyl-6-phenyl-7-(4-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-trifluoromethyl-6-phenyl-7-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5,7-diphenoxy-6-(2-methylpropyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-bromo-6-(4-bromophenyl)-7-dimethylamino[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(4-tert-butylphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

diethyl 2-{[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7yl]oxy}-2-isobutylmalonate;

5-chloro-7-(3-nitro-4-methylanilino)-6-(2,4,6-trifluorophenyl) [1,2,4]triazolo[1,5-a]pyrimidine;

7-(3-bromophenyl)-2-ethyl-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(3-bromophenyl)-6-(3-chlorophenyl)-2-ethyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-(3-methyl-2-butenyl)-6-phenyl [1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-dimethylamino-6-phenyl-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-[1,1 ′-biphenyl]-4-yl-5-chloro-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-ethyl-6-(2-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-difluoro-4-(1-propenyloxy)phenyl]-N-(2,2,2-trifluoro-1-methylethyl)-I[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-(3-tricyclo[2.2.1.0^2,6]hept-1-yl )-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

45. A method of treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof by administering to said mammal an effective amount of a substituted triazolopyrimidine derivative having a paclitaxel like mechanism of action on tubulin polymerization or a pharmaceutically acceptable salt thereof.

46. The method according to claim 45 wherein the substituted triazolopyrimidine derivative is a compound selected from those of the formula:

wherein:

R^cis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, heterocyclyl;

R^dis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, heterocyclyl;

R^cR^dtogether with the nitrogen atom to which each is attached represent an optionally substituted heterocyclyl ring from 3 to 8 ring atoms optionally substituted in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or alkyl of 1 to 12 carbon atoms; R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, halogen, cyano, carboxy, alkoxycarbonyl of 2 to 12 carbon atoms, heterocyclyl, halogen, carbamoyl, optionally substituted aryl of 6, 10 or 14 carbon atoms, or —CF₃;

provided that when:

or a pharmaceutically acceptable salt thereof.

47. The method according to claim 46 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^bor a pharmaceutically acceptable salt thereof is administered.

48. The method according to claim 46 wherein R^aand R^beach independently represent the moiety —C*H(R^e)(R^f) where R^eand R^findependently represent an optionally halo-substituted alkyl group of 1 to 12 carbon atoms where C* represents the (R) or (S) isomer or a pharmaceutically acceptable salt thereof is administered.

49. The method according to claim 46 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms, aryloxy, thienyl, benzyloxy, heterocyclyl or halogen or a pharmaceutically acceptable salt thereof is administered.

50. The method according to claim 46 wherein R³is halogen, alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, aryloxy, —NR^cR^d, benzyloxy, aralkyloxy, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, hydroxy, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃or a pharmaceutically acceptable salt thereof is administered.

51. The method according to claim 46 wherein R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃or a pharmaceutically acceptable salt thereof is administered.

52. The method according to claim 46 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached or a pharmaceutically acceptable salt thereof is administered.

53. The method according to claim 46 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms or heterocyclyl or a pharmaceutically acceptable salt thereof is administered.

54. The method according to claim 46 wherein R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or —N₃or a pharmaceutically acceptable salt thereof is administered.

55. The method according to claim 46 wherein R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃or a pharmaceutically acceptable salt thereof is administered.

56. The method according to claim 46 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 5 to 10 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached or a pharmaceutically acceptable salt thereof is administered.

57. The method according to claim 46 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms or a pharmaceutically acceptable salt thereof is administered.

58. The method according to claim 46 wherein R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃or a pharmaceutically acceptable salt thereof is administered.

59. The method according to claim 46 wherein R⁴is H or a pharmaceutically acceptable salt thereof is administered.

60. The method according to claim 46 wherein R¹is selected from the group consisting of an optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is optionally substituted phenyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

61. The method according to claim 46 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is optionally substituted phenyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

62. The method according to claim 46 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²³is optionally substituted phenyl;

R⁴is H;

63. The method according to claim 46 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is selected from

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

64. The method according to claim 46 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R²is optionally substituted phenyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

65. The method according to claim 46 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R²is optionally substituted thienyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

66. The method according to claim 46 wherein said compound selected from:

7-(1-azepanyl)-5-chloro-6-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(4-methoxyphenyl)-7-(1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-6-(4-bromophenyl)-5-chloro[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-(1-azocanyl)-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]methanol;

7-(1-azepanyl)-5-chloro-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

4-bromo-1-[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin -7-yl]butyl acetate;

5-chloro-6-(2-methylphenyl)-N-( 1,2,2-trimethylpropyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-butyl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chlorophenyl)-N-(2,2,2-trifluoro1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-hexyl[1,2,4]triazolo[1,5-a]pyrimidine;

7-butyl-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl )-7-(2-methylpropanyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-pentyl[1,2,4]triazolo[1,5-a]pyrimidine;

7-(bicyclo[2.2. 1 ]hept-2-ylamino)-5-chloro-6-{2-fluoro-4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-[(1R)-2,2,2-trifluoro-1-methylethyl]-6-(2,4,6--trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-(2,22-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-7-(4-thiomorpholinyl)[1,2,4]trazolo[1,5-a]pyrimidine;

(5-chloro-6-{2,6-difluoro4-[2-(2-methoxy-ethoxy)ethoxy]-phenyl}-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl-)-(2,2,2-trifluoro-1-methylethyl)amine;

5-chloro-7-phenoxy-6-(4-methoxy-phenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5,7-diphenoxy-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-methyl-6,7-di-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-methyl-6-phenyl-7-(4-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-trifluoromethyl-6-phenyl-7-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5,7-diphenoxy-6-(2-methylpropyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-bromo-6-(4-bromophenyl)-7-dimethylamino[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(4-tert-butylphenyl)[1,2,4]triazolo[1,5-a]pyrimidine; ethyl {[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]amino}acetate;

7-(3-bromophenyl)-2-ethyl-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(3-bromophenyl)-6-(3-chlorophenyl)-2-ethyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-dimethylamino-6-phenyl-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-[4-(benzyloxy)phenyl]-5-chloro-N-isopropyl [1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-ethyl-6-(2-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-difluoro4-[(3-methyl-2-butenyl)oxy]phenyl]-N-(2,2,2-trifluoro-1-methylethyl)-I[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-N-(3-tricyclo[2.2.1.0^2,6]hept-1-yl)-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

67. The method according to claim 1 wherein the cancerous tumor cells are selected from the group consisting of breast, colon, lung, prostate, melanoma, epidermal, leukemia, kidney, bladder, mouth, larynx, esophagus, stomach, ovary, pancreas, liver, skin and brain.

68. The method according to claim 23 wherein the cancerous tumor cells are selected from the group consisting of breast, colon, lung, prostate, melanoma, epidermal, leukemia, kidney, bladder, mouth, larynx, esophagus, stomach, ovary, pancreas, liver, skin and brain.

69. The method according to claim 45 wherein the cancerous tumor cells are selected from the group consisting of breast, colon, lung, prostate, melanoma, epidermal, leukemia, kidney, bladder, mouth, larynx, esophagus, stomach, ovary, pancreas, liver, skin and brain.

70. A pharmaceutical composition for treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof comprising an effective amount of a compound of Formula (I):

wherein:

R^cis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, or heterocyclyl;

R^dis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl , optionally substituted benzyl, or heterocyclyl;

provided that when:

l) R²is phenyl, R³is chloro, R⁴is hydrogen R¹is not (2E)-3,7-dimethyl-2,6-octadienyl or a pharmaceutically acceptable salt thereof in association with a pharmaceutically acceptable carrier.

71. A pharmaceutical composition for treating or inhibiting the growth of cancerous tumour cells and associated diseases in a mammal in need thereof by interacting with tubulin and microtubules by promotion of microtubule polymerization which comprises an effective amount of a compound of Formula (I):

wherein:

R^bis H, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl, —S-alkenyl, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO2cycloalkyl, —SO₂alkyl, —O-aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl, cycloalkyl of 3 to 8 carbon atoms or a 3- to 6-membered heterocyclyl ring, optionally ortho-fused with an optionally substituted phenyl ring;

provided that when:

l) R²is phenyl, R³is chloro, R⁴is hydrogen R¹is not (2E)-3,7-dimethyl-2,6-octadienyl or a pharmaceutically acceptable salt thereof together with a pharmaceutically acceptable carrier.

72. A pharmaceutical composition comprising a compound of Formula (I):

wherein:

provided that when:

b) R¹is diethylamino, R³is bromo, R⁴is hydrogen, R²is not 4-trifluoromethylphenyl; -p2 c) R¹is isopropylamino, R³is chloro, R⁴is hydrogen, R²is not 2-benzyloxyphenyl or 3,4,5-trimethoxyphenyl;

j) R¹is cyclohexyl, R⁴is hydrogen, R²is 2,4,6-trifluorophenyl, and R³is not —OCH₂0₂C(CH₃)₃;

73. A method for the treatment or prevention of multiple drug resistance (MDR) in a mammal in need thereof which method comprises administering to said mammal an effective amount of a substituted triazolopyrimidine derivative or a pharmaceutically acceptable salt thereof.

74. The method of claim 73 wherein the multiple drug resistance (MDR) is mediated by p-glycoprotein or MXR.

75. The method according to claim 73 wherein the substituted triazolopyrimidine derivative is a compound selected from those of the formula:

wherein:

provided that when:

j) R′ is cyclohexyl, R⁴is hydrogen, R²is 2,4,6-trifluorophenyl, and R³is not —OCH₂O₂C(CH₃)₃;

or a pharmaceutically acceptable salt thereof.

76. The method according to claim 75 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO2aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^bor a pharmaceutically acceptable salt thereof is administered.

77. The method according to claim 75 wherein R^aand R^beach independently represent the moiety —C*H(R^e)(R^f) where R^eand R^findependently represent an optionally halo-substituted alkyl group of 1 to 12 carbon atoms where C* represents the (R) or (S) isomer or a pharmaceutically acceptable salt thereof is administered.

78. The method according to claim 75 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms, aryloxy, thienyl, benzyloxy, heterocyclyl or halogen or a pharmaceutically acceptable salt thereof is administered.

79. The method according to claim 75 wherein R³is halogen, alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, aryloxy, —NR^cR^d, benzyloxy, aralkyloxy, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, hydroxy, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or -N₃or a pharmaceutically acceptable salt thereof is administered.

80. The method according to claim 75 wherein R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkoxy of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃or a pharmaceutically acceptable salt thereof is administered.

81. The method according to claim 75 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkynyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted bicycloalkyl of 5 to 10 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO2aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached or a pharmaceutically acceptable salt thereof is administered.

82. The method according to claim 75 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms or heterocyclyl or a pharmaceutically acceptable salt thereof is administered.

83. The method according to claim 75 wherein R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, amino, alkylamino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, or -N₃or a pharmaceutically acceptable salt thereof is administered.

84. The method according to claim 75 wherein R⁴is H, optionally substituted alkyl of 1 to 12 carbon atoms, amino, alkyl amino of 1 to 12 carbon atoms, dialkylamino of 1 to 12 carbon atoms, —CF₃or a pharmaceutically acceptable salt thereof is administered.

85. The method according to claim 75 wherein R¹is selected from the group consisting of an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 5 to 10 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached or a pharmaceutically acceptable salt thereof is administered.

86. The method according to claim 75 wherein R²is optionally substituted aryl of 6, 10 or 14 carbon atoms or a pharmaceutically acceptable salt thereof is administered.

87. The method according to claim 75 wherein R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃or a pharmaceutically acceptable salt thereof is administered.

88. The method according to claim 75 wherein R⁴is H or a pharmaceutically acceptable salt thereof is administered.

89. The method according to claim 75 wherein R¹is selected from the group consisting of an optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to 8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, and the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached; R²is optionally substituted phenyl; R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃; R⁴is H or a pharmaceutically acceptable salt thereof is administered.

90. The method according to claim 75 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached; R²is optionally substituted phenyl; R³is halogen, alkoxy of 1 to 12 carbon atoms, —NR^cR^d, haloalkoxy of 1 to 12 carbon atoms, alkylthio of 1 to 12 carbon atoms, cyano, or —N₃; R⁴is H or a pharmaceutically acceptable salt thereof is administered.

91. The method according to claim 75 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is optionally substituted phenyl;

R⁴is H;

R^ais H, optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, heterocyclyl, benzyl, optionally substituted benzyl; R^bis H, an optionally substituted alkyl of 1 to 12 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted aryl of 6, 10 or 14 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, optionally substituted cycloalkenyl of 5 to 10 carbon atoms in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms, —S-aryl of 6, 10 or 14 carbon atoms, —S-alkyl of 1 to 12 carbon atoms, —S-alkenyl of 2 to 12 carbon atoms, —SO₂aryl of 6, 10 or 14 carbon atoms, —SO₂cycloalkyl of 3 to8 carbon atoms, —SO₂alkyl of 1 to 12 carbon atoms, —O-aryl of 6, 10 or 14 carbon atoms;

R^cis H, amino, optionally substituted alkyl of 1 to 12 carbon atoms, haloalkyl of 1 to 10 carbon atoms, optionally substituted alkenyl of 2 to 12 carbon atoms, optionally substituted alkadienyl of 4 to 12 carbon atoms, optionally substituted cycloalkyl of 3 to 8 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted cycloalkenyl of 5 to 10 carbon atoms, in which one —CH₂— may also be replaced by —O—, —S—, or —NR′ where R′ is H or an alkyl group of 1 to 12 carbon atoms optionally substituted bicycloalkyl of 5 to 10 carbon atoms, aryl of 6, 10 or 14 carbon atoms, benzyl, optionally substituted benzyl, or heterocyclyl;

92. The method according to claim 75 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached;

R²is selected from

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

93. The method according to claim 75 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R²is optionally substituted phenyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

94. The method according to claim 75 wherein R¹is the moiety —NR^aR^bwherein R^aR^bare optionally taken together with the nitrogen to which each is attached and wherein R¹is selected from

R²is optionally substituted thienyl;

R⁴is H or a pharmaceutically acceptable salt thereof is administered.

95. The method according to claim 75 wherein said compound selected from:

7-(1-azepanyl)-5-chloro-6-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(4-methoxyphenyl)-7-(1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-6-(4-bromophenyl)-5-chloro[1,2,4]triazolo[1,5-a]pyrimidine;

6-(4-bromophenyl)-5-chloro-7-(3-methyl;-1-piperidinyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

7-(1-azocanyl)-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(4-methyl-1-piperidinyl )-5-amino-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-(2,5-dimethyl-2,5-dihydro-1H-pyrrol-1-yl )[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-{4-nitrophenyl}[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-N-ethyl-N-(2-methyl-2-propenyl)-6-[4-(methylsulfanyl)phenyl][1,2,4]triazolo[1,5-a] pyrimidin-7-amine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-tetrahydro-2-furanyl[, 2,4]triazolo[1,5-a]pyrimidine;

7-butyl-5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-hexyl[1,2,4]triazolo[1,5-a]pyrimidine;

7-butyl-5-chloro-6-(2,6-difluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-phenyl[1,2,4]triazolo[1,5-a]pyrimidine;

5-chloro-6-(2-chloro-6-fluorophenyl)-7-pentyl[1,2,4]triazolo[1,5-a]pyrimidine;

[5-chloro-6-(2,4,6-trifluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl] (1,5-trifluoro-1-phenylethyl)-amine;

5-chloro-6-(2,6-difluoro4-methoxyphenyl)-N-(2,2,2-trifluoro-1-methylethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-(2,6-difluoro-4-methoxyphenyl)-N-[(l S)-2,2,2-trifluoro-1-methylethyl][1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

4-{5-chloro-7-[(2,2,2-trifluoro-1-methylethyl )amino][1,2,4]triazolo[1,5-a]pyrimidin-6-yl}-3,6-difluorophenol;

5-chloro-7-phenoxy-6-(4-methoxy-phenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5,7-diphenoxy-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-methyl-6,7-di-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-methyl-6-phenyl-7-(4-chlorophenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

2-trifluoromethyl-6-phenyl-7-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5,7-diphenoxy-6-(2-methylpropyl)[1,2,4]triazolo[1,5-a]pyrimidine;

5-bromo-6-(4-bromophenyl)-7-dimethylamino[1,2,4]triazolo[1,5-a]pyrimidine;

7-(1-azepanyl)-5-chloro-6-(4-tert-butylphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

ethyl {[5-chloro-6-(2-chloro-6-fluorophenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7yl]amino}acetate;

7-(3-bromophenyl)-2-ethyl-6-(4-methoxyphenyl)[1,2,4]triazolo[1,5-a]pyrimidine;

7-(3-bromophenyl)-6-(3-chlorophenyl)-2-ethyl[1,2,4]triazolo[l , 5-a]pyrimidine;

5-dimethylamino-6-phenyl-N-cyclopentyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

6-[1,1′-biphenyl]-4-yl-5-chloro-N-cyclopentyl[1,2,4]triazolo[l , 5-a]pyrimidin-7-amine;

5-chloro-N-ethyl-6-(2-methylphenyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;

5-chloro-6-[2,6-difluoro-4-(1-propenyloxy)phenyl]-N-(2,2,2-trifluoro-1methylethyl)-I[1,2,4]triazolo[1,5-a]pyrimidin-7-amine;